Regarding the Abramsverse, which I do not buy into, has anybody mentioned Chekov?
In TOS Season 2, Kirk was 34 years old (Deadly Years) and Chekov was 22 (Who Mourns).
Then in the ST-XI, they're much closer in age. It can't be the same Chekov.
That happened long after the tinelines diverged in 2233, so even if Mama and Papa Chekov had a son earlier, it would not conflict with anything that happened in The Original Series.
Or perhaps Chekov-Prime told Kirk a little fib in "Who Mourns for Adonais", for reasons only he can fathom. He was an odd duck.