Subject
2 free books about onomastics, free to read online. Chapter 1 of any book is free, no account needed.
Family names from the Irish, Anglo-Saxon, Anglo-Norman and Scotch: Considered in relation to their etymology, with brief remarks on the history and languages of the peoples to whom we are indebted for their origin
Thomas G. Gentry
The Etymology of Local Names With a short introduction to the relationship of languages. Teutonic names.
Richard Morris