Terio Abdelkerim's Origine et évolution des Zaghawa: Du royaume du Kanem aux Etats modernes (VIIIe-XXIe siècle) is a worthy effort to unveil the deeper history of the Zaghawa peoples and the kingdom of Kanem. Although we have reached rather different conclusions on the early history of Kanem and the relationship between the so-called Duguwa dynasty and the Sayfawa, Abdelkerim uses oral traditions and a familiarity with the history of Zaghawa or Beri clans across Chad and Sudan to illustrate the clear "Zaghawa" origin of the ruling clan of Kanem. However, as indicated by the Diwan and Kanuri, Kanembu, and Tubu traditions and clan names, the modern Zaghawa (Koubara, Wegui, Touba Koube as the three main groups with smaller clans and divisions) have ancient ties to the Teda, Daza, Kanembu and Kanuri groups.
Indeed, if the Diwan is reliable on the mothers of various early mais, the ruling Zaghawa of Kanem intermarried with Tubu and Kanembu clans. Furthermore, as the Teda, Daza, and Zaghawa were mobile pastoralists, they also migrated back and forth through the Tibetsi, Ennedi, Borku, Kawar, Kanem, Borno, and other regions. The Zaghawa today, located on the frontier between Chad and Sudan, possibly migrated there in larger numbers after the so-called replacement of the Duguwa (Banu Duku) dynasty by the Sayfawa in the late 11th century. Or, alternatively, given the wide expanse of territory between Lake Chad and the Nile occupied by related Nilo-Saharan pastoralists, the "Zaghawa" of the medieval Arabic sources was actually a reference to the entire ensemble of black pastoralists in the central Sahara. This would probably explain why the "Zaghawa" were already known to Arabic sources as early as the beginning of the 8th century, since black Saharan populations west of Nubia and south of the Fazzan may have already formed the early state of Kanem to the south.
In addition, linguistics possibly supports a "Zaghawa" or Beri affinity for the early rulers of Kanem. According to al-Yaqubi, writing in 872, the kingdom of Kanem was "Zaghawa" and called Kakira. The Zaghawa language, however, retains the word kireh for emperor or kings, as indicated by Abdelkerim. We are thus inclined to view al-Yaqubi's brief account of 9th century Kanem as evidence of a Zaghawa ruling clan that must have been related to various Teda, Daza and proto-Kanembu groups through marriage. Indeed, genetics likely supports this scenario as population admixture studies of Chadian groups indicates mixing between a group of Eastern African origin with one of West-Central African origin around 1000 years ago. Of course, the Tubu of Chad also have significant Eurasian ancestry that reflects deeper histories of Eurasian backflow into this part of Africa. Nevertheless, this must have been the fusion of the Zaghawa, Teda, and Daza with sedentary populations already in Kanem and the Chad Basin. Their fusion would ultimately lead to the Kanembu and Kanuri populations. Perhaps the use of the term Beriberi by the Hausa to refer to the Kanuri is actually an allusion to the Zaghawa, or Beri, peoples?
Unfortunately, Abdelkerim believes the Zaghawa language is a Berber one and its population of Berber origins because of Ibn Khaldun and other medieval writers. Since some of them have classified the "Zaghawa" as Berbers or mentioned their use of the litham, many scholars have uncritically repeated this. However, the alleged Berber influence was probably restricted and more likely than not simply a case of Berbers in the Sahara and Sahel who were assimilated into Tubu and Zaghawa populations. After all, even al-Idrisi cited a similar case of this in the Sahara during the 12th century. The Nilo-Saharan language family of the Zaghawa and all the available evidence from the Diwan and Kanuri oral traditions supports an early ruling dynasty of Teda, Daza, and Zaghawa origin. Even the name Dugu or Duku, remembered as Douk Bourme in Zaghawa oral tradition, is a further testament to Zaghawa origins. Even if the name as remembered by the Zaghawa meant courageous young man with light skin, this does not require a Berber origin. "Red" and "black" clans among the Tubu, for instance, could be what the Diwan was referring to when they identified the first "black" mai as only appearing in the late 12th century.
In consideration of the available evidence, one can justifiably question whether or not there really was a dynastic change from the Duguwa to the Sayfawa in the 11th century. Abdelkerim agrees with scholars such as Lange who see dynastic change because of the language of one copy of the Diwan or a few other sources. However, since the Diwan, Ahmad b. Furtu, and Kanuri oral traditions and Magumi sub-clan divisions support overall continuity from the Duguwa to the Sayfawa, one can plausibly reject the theory. Even if it is true that the Sayfawa embrace of Islam was resisted by some of the Zaghawa ruling elite in Kanem, who had to be replaced by Humme, one is still left in the dark about why the Magumi royal clan of the Sayfawa retained divisions claiming descent from pagan Duguwa mais? Moreover, why was the last Duguwa mai remembered as Abd Abd al-Galil, a very Arabic name? We are inclined to believe that some of the 11th century mais of Kanem may have already embraced Islam, perhaps the Ibadi sect which was active in the nearby Fazzan?
After all, centuries of trade and contact with Ibadi traders and even Berber merchants in Kawar would have facilitated the spread of Islam by the 1000s. Perhaps the Sayfawa were really just a more devout, Sunni Muslim branch of the ruling elite who saw greater benefit through the full embrace of Sunni Islam. Whether or not this actually precipitated a mass exodus or dispersal of Zaghawa to the east is unknown, as Kanem may have exerted influence on "Zaghawa" and "Daju" in the Chadian-Sudan borderlands. As for Islam's impact on the ruling dynasty and possible anti-Muslim resistance, perhaps it is important to note the late and slight Islamization of various Tubu and other populations in Kanem and Borno. If the masses were, for the most part, left alone, and some pre-Islamic rituals like coronation rites or certain beliefs in the king's power to influence fertility of the land persisted, then the conversion to Islam could have been accomplished in a manner that did not necessarily trigger too much resistance. Perhaps something comparable to various coronation rituals and harvest festivals later observed for the Keira sultans of Darfur was practiced by the early Muslim mais of Kanem.
If the rulers of Kanem had already, by this time, been accustomed to wearing fine textiles imported from trans-Saharan trade and interacting with Muslims for centuries, it is possible that a Muslim faction was already present in the court at Manan. Like Ghana in the Western Sudan, perhaps there were local and foreign Muslims already incorporated into the administration by this time. If our admittedly speculative theory is correct, then Kanem before the reign of the first Sayfawa mai may have had Islamic rulers or at least prominent Muslim administrators, traders, and teachers. Perhaps, although our only evidence is al-Bakri, a branch of the Ummayads may have fled to Kanem. Like the later recorded history of the Sayfawa, maybe members of the royal family already converted and began their study of Islam through the help of pious teachers like Muhammad b. Mani. Muslim traders established in Kawar and the Fazzan would have been an additional vector for Islamic propagation that might have appealed to the rulers of Kanem. Embracing the religion officially would have increased the stature of the kingdom to many of its Muslim trading partners and perhaps offered way for a new branch of the ruling family to build alliances with powerful allies.
In conclusion, the Duguwa and Sayfawa were really one single dynasty. The Zaghawa or Beri origins can be deduced from the external Arabic sources. The "Zaghawa" in the Arabic sources likely included various related populations like the Teda and Daza. Over time, the Zaghawa kingdom of Kanem, which may have arose as early as the 500s in Lange's view, became known through trans-Saharan trade. A growing Muslim presence in Kawar and Kanem itself would have created conditions propitious for an eventual royal conversion. Since many of the Tubu and Zaghawa groups were nomadic or semi-nomadic and likely not forced to convert, Kanem's Islamization did not necessarily create a Zaghawa exodus to the east. The evidence for dynastic continuity throughout the history of Kanem-Borno may be further deduced from Magumi clan divisions claiming descent from various pre-Sayfawa kings. The incorporation of various sedentary populations already established in Kanem when the Saharan forebears of the Duguwa/Sayfawa entered the region were gradually incorporated into the state to the point where even non-Kanembu groups claimed descent from pre-Islamic kings like Bulu. Amazingly, references to the Zaghawa role in the origins of Kanem may be recalled in the Hausa appellation of Beriberi for the Kanuri.