When your firstborn's name is special...

So my husband and I recently found out we are pregnant again. However, we've ran into a snag: our first child has a name with a very special meaning. By that I mean, we named our son after an uncle of mine who passed away. My husband and I picked our son's name before we ever got pregnant or married, in fact, we picked our son's name just weeks into dating because my now husband loved hearing the story of my uncle. And that's where our problem is. When I got pregnant with our son, and we found out he was a boy, instantly his name was already picked. It had a special meaning to my husband and I, as well as my whole side of the family. Additionally, we love the meaning of the name. How are we supposed to find another name that can "equal" a name that holds so much meaning to us? We have looked throughout our family trees, but no name impacts us the same. We just don't want our son's name to eclipse his siblings...