Seaghan an Diomáis CLG was a Gaelic Athletic Club based in Belfast in the early part of the 20th century. As county champions in 1910, they represented Antrim in the subsequent Ulster and All-Ireland Senior Football championships, becoming the first Ulster team to play in an All-Ireland Final.
Name.
The name "Seaghan an Diomáis" translates to English as Shane the Proud, and refers to Shane O'Neill, an Irish chieftain of the O'Neill dynasty of Ulster in the mid-16th century.
Though they are named for the same person, "Seaghan an Diomáis CLG" is not related to the current hurling club Shane O'Neill's Glenarm.
Honours.
Seaghan an Diomáis won eight county championships in between 1903 and 1915 in both hurling and football.