I'm sorry, but that would be utterly retarded.  Clannad (the band), the name clearly explained multiple times in their history as an amalgamation of the Gaelic Clann As Dobhar, has been active since 1972 and has spearheaded a specific style of music on their own and additionally as an influence to many other bands.  "Clannad", the novel/game, was created in 2004 with NO explanation of why they chose that name for the Latin-alphabet spelling, other than a rumored summation that the creator may have liked Clannad (the band). ₪—  (T·C)  "