FreeCEN 1841 Census of Aberdeenshire The Oxford Names Companion, OUP "Scottish Forenames" - Donald Whyte, FGH, FSG
Notes:
Scandinavian, from the Old Norse Ivarr [q.v.]. The meaning is obscure but could be from "yew/bow" and "warrior" i.e. "warrior archer". Brought to Argyll about 1330 where it is a spelling variant of Ivor [q.v.].
Thanks to Donald Whyte who provided much of the initial information for this site.