The origin of the name Ocean is Londonderry, England.

The name derives from gaélico O Ocean or Cathain.

Some variations of this family name include: Cain, Caine, Kane, Kain, Cahan, O'Cahan, Kean, O'Keane, Cean, Cean, Kahan, O'Kean, O'Kane, Kaine, Keanna, Cainn, Kainn, Chaann , O `Cain and others.