50 Perfect Sibling Names for Theodore (Brother or Sister)

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If you’re about to welcome a new member to the family, undoubtedly, you’re excited. You’re also probably having to come up with a lot of new ways to do something.

Plus, you need to decide on a name for your new baby.

But not only do you need to come up with a name that fits your baby, you also want to make sure it works well with your other kids’ names.

People will search Google for hours to find the perfect baby name. However, it can add extra pressure when you need to find a name that sounds right with your other kids.

That’s why I’ve decided to start compiling a series of The Best Sibling Names. Now, you’ll have one easy place to look to find name options that will mesh well with your existing child.

Without any further ado, here are the best sibling names for a boy named Theodore.

I’ve compiled these from baby name databases, parent discussion forums, and other sources, then whittled them down to the ones I personally think sound the best.

Hope it helps!

25 Brother Names for Theodore

And now, let’s tumble right into the list!

A good number of these ideas come to us straight from real parents of real girls Theodores or Theos who have shared their real-life sibling names in different places around the web, or at least their runners-up. I also came up with a few ideas of my own to help bulk up the list.

  1. Adam

  2. Aidan

  3. Bennett

  4. Bradley

  5. Caleb

  6. Dawson

  7. Elliott

  8. Ethan

  9. Grayson

  10. Harrison

  11. Joshua

  12. Justin

  13. Kai

  14. Kenneth

  15. Lawson

  16. Lennox

  17. Liam

  18. Luke

  19. Malcolm

  20. Noel

  21. Orson

  22. Parker

  23. Phillip

  24. Ryder

  25. Zachary

25 Sister Names for Theodore 

  1. Adelaide

  2. Amelia

  3. Anna

  4. Brielle

  5. Catherine

  6. Celeste

  7. Corinne

  8. Elizabeth

  9. Estelle

  10. Faith

  11. Gracelyn

  12. Heather

  13. Isabelle

  14. Laura

  15. Madison

  16. Morgan

  17. Norah

  18. Olivia

  19. Paige

  20. Rachel

  21. Sage

  22. Sophia

  23. Stephanie

  24. Tabitha

  25. Victoria

My favorite name for Theodore’s brother is Zachary, and my favorite name for Theodore’s sister would have to be Tabitha.

I like how these names flow so well when you say them with Theodore. There are so many choices, though, so you should pick the ones that sound the best to you!

Meaning of the name Theodore

As you look up names for your new baby, you’ll also come across their meanings. Understanding what Theodore means can help your decision-making, as you may want to choose names with compatible meanings. 

According to BabyCenter, Theodore is of Greek origin and means “divine gift” and “full of goodness.” 

Theodore is number 48 on BabyCenter’s popularity list for boy names for 2022. It’s moved up five spots since 2021.

Some famous people named Theodore are president Theodore Roosevelt, Jr. and baseball player Theodore Samuel “Ted” Williams. Roosevelt had a brother named Elliott and two sisters, Corinne and Anna. Ted Williams had a brother named Danny.

Wrapping Up

Those are just a fraction of my favorite brother and sister names for Theodore.

If you didn’t find what you needed, keep the search going! I suggest visiting parenting discussion forums like Nameberry, reddit, or Babycenter. If you use the search feature on those sites, you’ll find tons of old threads filled with ideas for sibling names. Or start a thread of your own for some fresh input.

Before you go, you might want to bookmark some of our nursery guides in case you’re rusty! Like when to start the nursery or whether you really need blackout curtains

And for more sibling names, read:

Hope this helps!