Owen and Nolan too similar??

Hello everyone. I'm expecting twin boys🩵🩵 I absolutely love the names Nolan and Owen. But I'm worried they're way too similar.

I already have 2, non twin, girls and their names coincidentally end in -lyn.

Yes I do stumble over their names but it's not just mixing up their names. I'll call the dog or cats by other names too. In my house you get called your siblings and pets names at least once before my brain gets to the right name 😂😂 so I doubt it really matters what names we choose because I'll still stumble over everyone's names occasionally 😅😅

With that being said, are Owen and Nolan too similar to each other? Should I try finding different names? I want to keep Owen for sure. Like, that name is already set in stone for twin A for family reasons. But I'm not sure on Nolan or a different name for twin B.