For John Legh, IV , his birth year being 1410 make his mother out to be pregnant at age 10 and giving birth at age 11. The birth year for Alice Alcock is unambiguous: 20 Nov 1399.
For Richard Leigh, of Rushall , the circa birth year is 1446, which is long after his mother died. If the circa birth year for this Richard Leigh is valid, then he's not a son of parents to whom he's linked. Say his circa birth were to be adjusted 26 years earlier, that would make him about age 88 for death—a rather old age for the time, though (not impossible.
