You're welcome, I hope you like it!
Yes it does, though the line of the stewards is joined with the line of the kings at some point, and the last king was Eärnur (almost 1000 years before the War of the Ring).
No, it's not possible (besides, Aragorn's family tree follows the line of Arnor, not Gondor. You can see it if you play with Eriador).