Go ahead. I'd like to see what someone can do with it.
Any thoughts on marriage partners for John's kids here? I purposely moved his son's birth to as late as it is to avoid an Isabelle d'Angoulême match in the next generation. Considering the age gaps between John's OTL daughters and their husbands the girls might even wed to the same men (more or less). OTL Isabella was betrothed to the more age-appropriate son of Friedrich II, Heinrich (VII), but then it was decided that he should marry the Babenberg girl instead, and the betrothal was switched. Joan was supposed to marry the comte de Lusignan (her mother's former beau), but he grew impatient waiting so he married her mom instead. Joan was then married to the king of Scots (b.1198).
So here's what I'm thinking:
Eleanor (b.1194) to Emperor Friedrich II (b.1194)
Blanche (b.1197) to ?
Constance (b.1203) to Alexander II of Scots (b.1198)
Isabella (b.1206) to ?
Joan (b.1207) to Jaime II, king of Aragon (b.1208) ?
A Lusignan marriage as well as a Montfort marriage seem unlikely to occur all things considered.
Hmm, I think Eleanor to Friedrich makes sense.
Blanche to either Alexander II or to Philip Count of Bolougne could be interesting.