I certainly don't think it's creepy. I come from a family who for generations has used 'matching' names. My Grandmother named her kids Fay, Gay and Ray (this was 70 years ago! My Mother (Fay) Named her kids James (named after my Dad, goes by 'Duke'), Jamie, Del, Adel (me) and Kent (our oddball). My brother has a Derek and an Erika. I didn't plan on using matching names myself. I did want to name my first daughter after my sister, whom I adore. So, my first born is Jamie Fay. The U/S said my second child would be a girl. I didn't even have a boy's name picked out. Well, he was a boy. We quickly decided to name him after my Dad giving me Jamie & James. People gave me grief about it but I was just naming my kids after two beloved family members. I didn't do it to be cute.
That being said. I loved having a name that was close to my brother's. I never got teased over it. We are not scarred. We don't need therapy, lol! I always felt a little closer to him because of our names.
I asked my daughter Jamie if it was even an issue for her, did it get confusing. She said no. She said growing up it was actually more confusing trying to distinguish her name from her sister's when we called. Jamie and Cassidy both ending in the "e" sound. Now my James goes by James. If we had called him Jimmy, I think there might have been some confusion!
Another thing to consider, kids grow up and move away. They don't spend the rest of their lives living side by side. My brother Del lives in another state. At this point the matching name thing is a non issue.
My Jamie didn't keep the tradition of matching names. She did name her daughter 'Delaney' which is supposed to be a tribute to me and her favorite uncle. Her son's ended up with names that are both books in the Bible. Who knows, maybe she's starting another tradition!
Name your kids the names that you love! It doesn't really matter what others think. I think both Ella nd Eli are adorable names!