Liam is a variant of this slightly longer name that's from Old German
Liam has been the most popular name for boys in Canada and the... [DOC] [TLE] William (given name) - Wikipedia [PAR] ... Wiremu (Maori); Willelm (Old English); Wullie, Wully, Weelum, Willum (Scots) ... 
to Greek, used when referring to foreigners with that version of the name.