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Gwilym meaning and name origin
Gwilym \g-wilym, gwi(l)-ym\ as a boy's name is a variant of Guillaume (Old German), and the meaning of Gwilym is "will helmet, protection".
The baby name Gwilym sounds like Gilam, Calum, Colum, Colm, Callum and Clem. Another similar baby name is Gwillyn.
Popularity of Gwilym
Gwilym is not a popular first name for men and an equally uncommon surname or last name for all people. (1990 U.S. Census)
Displayed below is the baby names popularity of the name Gwilym for boys. (2010 statistics) Compare Gwilym with its source form and related boy baby names.