Aldwyn \a-ldw-yn, al-dwyn\ as a boy's name is a variant of Alden (Old English) and Aldwin (Old English), and the meaning of Aldwyn is "old friend".

The baby name Aldwyn sounds like Eldwyn and Aldwynn. Other similar baby names are Alwyn, Aidyn, Alyn, Allyn, Alleyn, Albyn, Eldwynn, Aldin, Aldan, Aldon, Aldrin, Alswynn, Aldwynne, Aldwinn, Alwynn, Alwin, Alvyn, Ailwyn, Baldwyn, Gladwyn and Goldwyn.