50 Perfect Sibling Names for Declan (Brother or Sister)

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Congratulations! You’re about to add another kid into the mix, and you know it will be great but busy. You also are probably wondering how the new addition will mesh with your other kids.

A top priority with a new baby is choosing a great name. But, when you have more than one child, you also want to pick a name that works well with your other kids’ monikers. You need something that rolls off the tongue and flows.

People spend hours searching Google for the perfect baby names. But, it can take a toll on your energy when trying to find a name and match it up with other names.

So here we are with the best sibling names for a boy named Declan.

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 Declan 

Let’s see the list!

Most of these ideas actually came from real parents of real boys named Declan who have shared their real-life sibling names around the web, or at least their runners-up. I’ve also thrown in a few ideas of my own to beef up the list.

  1. Abram

  2. Beckett

  3. Bryce

  4. Dante

  5. Ethan

  6. Grant

  7. Henry

  8. James

  9. Joseph

  10. Kane

  11. Kayden

  12. Kieran

  13. Liam

  14. Levi

  15. Logan

  16. Luke

  17. Matthew

  18. Nathan

  19. Oliver

  20. Ronan

  21. Sean

  22. Steven

  23. Thomas

  24. William

  25. Vincent

25 Sister Names for Declan 

  1. Alice

  2. Amelia

  3. Ariella

  4. Bree

  5. Brianna

  6. Camelia

  7. Caroline

  8. Claire

  9. Daniella

  10. Emerson

  11. Gemma

  12. Hayden

  13. Isabelle

  14. Kimberly

  15. Kyla

  16. Laney

  17. Luna

  18. Moira

  19. Noelle

  20. Paisley

  21. Patricia

  22. Rachel

  23. Sophia

  24. Tess

  25. Victoria

My favorite name for Declan’s brother is Grant, and my favorite name for Declan’s sister would have to be Bree.

I like how these single-syllable names sound when you say them with Declan. There are so many choices, though, so you should pick the ones that sound the best to you!

Meaning of the name Declan

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

According to BabyCenter, Declan has English roots meaning “man of prayer” and “full of goodness.” 

Declan is number 97 on BabyCenter’s popularity list for boy names for 2022. It’s held the same spot since 2021.

Some famous people named Declan are Elvis Costello, who was given the name Declan at birth. He has four half-brothers named Ruari, Ronan, Liam, and Kieran. And British performer Declan Donelly, who has six brothers, Dermott, Martin, Eamonn, and three sisters, Patricia, Camelia, and Moira.

Wrapping Up

So there you have it, some of my absolute favorite brother and sister names for Declan. 

Hopefully, you found a few you like as well. If not, I encourage you to keep the search going! Browse parenting discussion forums like Nameberry or Babycenter and you’ll find tons of old threads filled with ideas. Or start a thread of your own for some fresh input.

If it’s been a few years since Declan was born, you might want to bookmark my handy newborn shopping list to help you stock up before you go.

And finally, for more sibling names, don’t miss:

Hope this helps!