I'm stuck at Mads Olsen

I'm stuck - can't find dates for Mads Olsen - or his parents. Mads Olsen from Reisvåg married to Ingereid Jakobsdtr 1680-1774. They had a son Ole Madsen from Ugjel (sometimes spelled Ulgjel) and Frestadheia married 1760 Gulborg Johannesdtr from Tomstad.