You have the 'Disambiguation' section on both profiles. Wiki IDs should be included with parent names in both children profiles, and then something included in the parent's profiles also.
Since they don't have the same spouse, it would see a bit more questionable about them being the same person, though. Valoines-3 has a birth year that is uncertain, especially compared to the 1st child. That 1st child has its own issues on birth, and parents, also. If the child of that 1st child has correct birthyear, then that child can't be a 1st child of Valoines-3.
Valoines-3 says she married Ralph in 1181 but the Valoines-19 has children born in 1160s which doesn't match to marriage date.
There is too much ambiguity and different spouses and information, as well as parents to merge those 2 records, I think, after looking at the information in those profiles. The comments, from 2014 on Valoines-19, also don't seem like they should be merged.