dweller at or near the burgh or stronghold (of the castle).
The name Burke is deriverd from the name De Burgo.
The de Burgo Civil War
This was the name given to a conflict in Ireland, sparked by the death of William Donn de Burgh, 3rd Earl of Ulster in 1333. His only child, Elizabeth, lived in England, and eventually married into the English Royal family but she was Countess in name only.
Various factions of the de Burghs fought with each other for control of the Earldom (the name by now had been Gaelisized to Burke depending whether they were under the lordship of Ulick in County Galway, or spelled Bourke if in County Mayo)5 The factions were headed by Sir Ulick Burke (d.1343), Sir Edmond Albanach Bourke (d.1375), and Sir Edmond de Burgh of Castleconnell (k.1338 – Sir Edmond of Castleconnell is the ancestor of the Bourkes of Clanwilliam in Munster).3