1. English, derived from the Latin personal name Lucius, from Latin "light", via the Anglicised variant Luke which gave rise to the 12^th century surname Lucas. Luke [q.v.] is now the more popular forename, especially in the US.

Note that the Gaelic spellings have accents: The Scottish is Lùcas and the Irish is Lúcás.

In old documents in Latin, Lucius, Lucas or Lucias may be used for Luke, with appropriate case endings.

2. Normal Dutch form of Luke.