Deiniol \de(i)-niol\ as a boy's name is a variant of Daniel (Hebrew), and the meaning of Deiniol is "God is my judge".
The baby name Deiniol sounds like Danil and Danial. Other similar baby names are Aniol, Derrill, Derril, Dino, Deion, Dennie, Denis, Dennis, Denies, Denzel, Denzyl, Denzill, Denzil, Denziel, Dingo, Dionio and Teino.