Complex sentence: There is, however, no evidence that Robert Fitzooth existed; his genealogy appears to be mostly fictional, earlier sources say that Robin lived later and was of yeoman rank, and no modern historian takes the "Fitzooth" identification seriously.
Split into simpler sentences: There is, however, no evidence that Robert Fitzooth existed; his genealogy appears to be mostly fictional. Earlier sources say that Robin lived later and was of yeoman rank, and no modern historian takes the "Fitzooth" identification seriously.