Hello Liz, the marriage that Donna has found needs checking to see who the Parents are,

Timothy O'Brian and Elizabeth Comish 8 July 1883 Braddan

while checking marriage, check for,
Baptism,
Timothy O'Brian c1858

the following are submitted entries on IGI

but worth checking out,

Timothy O'Brian abt. 1858 DUKE LANE, Douglas

Michael O'Brian marriage about 1857 DUKE LANE, Douglas

Averil