Eldwyn \e-ldw-yn, el-dwyn\ as a boy's name is a variant of Alden (Old English), Aldwin (Old English) and Elden (Old English), and the meaning of Eldwyn is "old friend, Ella's hill". The baby name Eldwyn sounds like Eldwynn, Eldwin and Aldwyn. Other similar baby names are Elwyn and Edwyn. View a list of the 3 names that reference Eldwyn.