529K Plans

Are 529k plans for children divisible when one is for a child prior to marriage and the other child is within the marriage? Is it considered a gift to the children?

What about Roth accounts that was rolled over from a 401k before the marriage? The 401K was saved before the marriage.

529s are not divisible as they are not the property of either spouse, but property held for the children.
An IRA rollover from an account established prior to the marriage is not marital.