Lusk (Irish: Lusca) is a small town in Ireland, 23 km (14 mi) north of Dublin city centre. The name "Lusk" is said to date back to Saint MacCullin, who founded a church there c. 450. Oral tradition suggests MacCullin may have either lived in or been buried in a cave and that the name "Lusk" derives from an old Irish word Lusca meaning 'cave' or 'underground chamber'. MacCullin died in c. 497 and his feast day was the 6th September. The area was known as Bregia in pre-Christian times and is known to have been birthplace to Cú Chulainn's wife, Emer. Thus we find a 20th-century tradition among old Lusk families of naming daughters Emer.