What is "mcgavin"

The surnames MacGavin and McGavin are Scottish surnames, which are possibly variations of the surnames McGowan and MacGowan. MacGowan and McGowan are Anglicised forms of the Scottish Gaelic MacGobhann and Irish Gaelic Mac Gabhann, meaning "son of the smith". When the surname MacGavin and McGavin originate from Glasgow and Moray, they can be represented in Scottish Gaelic as Mac a' Ghobhainn.