 The will of one William Duke, of Kyllenagh, Kildare, recorded 1551, is found in the records at Dublin.After this early date, the family name appears with more or less variation in form, and with increasing frequency upon the pages of the Irish Public Records.Hanna, in his "Scotch-Irish Families of Ulster", estimates that there were in 1890 within the province of Ulster 268 persons bearing the name Duke.