How Powerful is Aragorn

[Tigerlily Gamgee]

OK, I found the book (I am in the processing of packing, so it was buried). Here are some passages that may help...
From Appendix A

Arador was the grandfather of the King. His son Arathorn sought in marriage Gilrean the Fair, daughter of Dirhael, who was himself a descendant of Aranarth.

... Gilrean bore him a son, and he was called Aragorn. But Aragorn was only two years old when Arathorn went riding against the Orcs with the sons of Elrond, and he was slain by an orc-arrow that pierced his eye...

Then Aragorn, being now the Heir of Isildur, was taken with his mother to dwell in the house of Elrond; and Elrond took the place of his father and came to love him as a son of his own. But he was called Estel, that is "Hope", and his true name and lineage were kept secret at the bidding of Elrond...

It was at the age of 20 that Elrond told Aragorn who he really was. Elrond told Aragorn of his heritage and that he would do great things. It was the day after that that Aragorn first beheld Arwen (she lived in Lothlorien during the time he was raised).