Why Sakura and syaoran at the end say their names are tsubasa and why do they have the same name tsubasa and why did they name themselves sakura and syaoran if that's not their real name?

Old Answer-what do you mean like how they have the same name as in cardcaptor its because they are supposed to be a different dimension and syaoran(the real one) is the sakura and syaoran from cardcaptors son

Technically this is a bad answer because if this person read the manga then they would have known that Cardcaptors Syaoran and Sakura are not the real "Syaoran's" parents. His real parent are the clones Syaoran and Sakura :0. The real "Syaoran" took his father's name. But it does get confusing because that means the clone Syaoran's other self is HIS SON!!! But no one is sure why they have the same name but I think Clamp wanted more drama.Hope this answered your question!

PS This was not to insult the former person.PSS Cardcaptor Sakura was in the Tsubasa manga.