I've been investigating these profiles and updating Crichton-1450 and I'm certain they are the same. Crichton-230 is unsourced and I suspect the birth date was a very rough guess. From the changes tab, of Crichton-230 and his daughter it looks like they are intended to be the same as Crichton-1450 and his daughter.
I've also changed the birth date of John Crichton profile to about 1490 based on some of the sources, and I would estimate the daughter Agnes was born about 1520 but it's getting late here and I won't be able to do anymore now, hopefully tomorrow.