Anthony Kirk-Greene’s scientific contributions

... He spent some fifteen years in Freetown, Sierra Leone, where he studied Hausa with freed slaves (Schön 1843). After returning to England, he continued his interest in Hausa, working with two speakers who had been brought back to Europe in the mid-1850s by the famous traveller Heinrich Barth (see Kirk-Greene and Newman 1971). One (Dorugu) was a native speaker, the other (Abbega) was a native Margi who spoke Hausa as a second language. ...

Reference:

The Hausa Lexicographic Tradition

... Those who were swayed by his teachings and embraced Islam felt compelled to abandon their Indigenous names due to societal condemnation and demonization (Lenshie & Ayokhai, 2013). It has been reported in literature that most individuals who converted changed either their first name, last name or both (Adeleye, 1971). For instance, some chose to adopt a hybrid identity such as Ahmed Olatunde while retaining their original surname. ...

Reference:

Identity and Culture of Naming Among the Yoruba of West-Africa