Complex sentence: Inga married Ragnfast of Snottsta (also spelled Snåttsta) and they had a son who is not named, but both Ragnfast and the son died and so Inga inherited the estate Snottsta U 29: Ragnfastr of Snutastaðir got her (to wife).
Split into simpler sentences: Inga married Ragnfast of Snottsta (also spelled Snåttsta) and they had a son who is not named. Both Ragnfast and the son died, so Inga inherited the estate Snottsta U 29: Ragnfastr of Snutastaðir got her (to wife).