Somhairle Buí Mac Domhnaill (Gaeilge) / Somhairle Buidhe Mac Domhnaill (Gàidhlig) / Sorley Boy MacDonnell (English) was so-called (Buí/Buidhe) because of his “yellow” hair. Although his family was from the islands, he was born just outside Ballycastle in 1505 and is known for establishing the Mac Donnells in Antrim and for frustrating the plantation (WP | Tudor & Stuart Perspectives).
The mural was painted by Oliver McParland (web) in North Street, Ballycastle.