WI: the Carolingians don't die out in France?

Louis V was the last Carolingian king of France, he had no issue with his wife Adelaide-Blanche of Anjou who was 25 years older and even after their marriage was annulled she went on to have children, so WI they stay married longer and have issue before Louis V's death how would this change Europe etc.
 
They did not die out. Charles of Lorraine was the uncle of Louis V and youger brother of king Lothar I.
 
I know that, but what I meant was that the dynasty still controls the crown of France.

They need the same dynastic luck that the House of Capet had, which means that you need to avoid the Carolingians' dynastic infighting, the Investiture Controversy and the break down of social cohesion in France. That's a pretty tall order. Good luck.
 
Just don't marry him to Adelaide in the first place. if he, instead, married someone like Gisèle Capet, who is of royal blood and around his age. It's recorded she had at least one son, so it's perfectly acceptable that she's give him 1/2. She'd be 19 on his death, so 2 children is actually very easily done. Let's say 1 girl and 1 boy, most likely named Lothair, Charles or Louis and Matilda, Emma or Adelaide. Let's say their named Lothair (b.985) and Adelaide (b.987).

What happens on their death is hard to say. I'd imagine Hugh Capet would definitely support his grandchildren. His daughter most likely is remarried soon, probably where she married OTL. This let's Enguerrand of Ponthieu still exist, which is a nice butterfly net to have.

King Lothair II of France most likely is married off kinda young, so maybe to Gisela of Bavaria, who wold most likely give him at least one son, maybe 2 like how she did OTL for Stephen I of Hungary. As for his sister, Henry II, Holy Roman Emperor would make a hood match, particularly if she can give him children, unlike his wife OTL.
 
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