When Abraham was aged ninety-nine and his wife eighty-nine, the Lord appeared to him and promise that his wife would bear him a son within a year, But there was a catch this time. He needed to change his name from Abram, meaning Exalted Father to Abraham, which means The Father of Many. You can just imagine the reaction of his friends when they receive a card from Abraham assuming it was an invitation to his hundredth birthday party. Instead they find an announcement from the childless nonagenarian that from now on he wanted them to address him as the Father of Many. It was humiliating, but then patient faith often is. It is costly but it never goes unrewarded.
From the book "Straight To The Heart Of Hebrews And James"