McClure (surname) hard and vigorous a “clur.” This expression is still commonly used in Ireland. McClure (surname) McClure is a surname with several origins. One origin of the name is from the Scottish Gaelic "MacGilleUidhir", and Irish "Mac Giolla Uidhir", which probably mean "son of the pale one” or “son of the cold one.” Another origin of the name is from the Scottish Gaelic "MacGilleDheòradha", and the Irish "Mac Giolla Dheóradha", which mean "son of the servant of the pilgrim". In the Scottish clan system, McClures are a sept of Clan MacLeod of Dunvegan. Famously, an Irish king with the surname McClure
Mac and Mc together in print two publications on filing rules, one covering that "word-by-word" convention, and another prepared in 1980 that is "letter-by-letter". A 1998 book attributes the changes to the rules to computer informatics, and notes the Mac/Mc change as its first example. 1982's "Scottish Roots", a guide for family history researchers, warns that older Scottish records do not in fact follow this convention, unlike contemporary telephone directories. A 2001 book of "New York Times" theatre reviews sorts Mc names as if spelled Mac. A 2002 official document for the State of Vermont recommends explicitly no special treatment for Mac and Mc.