Robuck Lynch, sixth Mayor of Galway, 1489-1490.
Along with the first two Mayors (Peirce Lynch and Dominick Dubh Lynch, Robuck is believed to have been a son of John Lynch, who was father to Nicholas and John Lynch. This demonstrates the hold that the Lynch family held on the town's Mayoralty from the very first years of its creation. He appeared in the will of Pierce Lynch in 1507 and appears to have been the same man elected Mayor in 1501.
References
Robuck Lynch Wikipedia(Text) CC BY-SA