Naming a second child is a different problem from naming a first. You are no longer choosing one name. You are choosing a pair, and you will say them together for years: at dinner, at the door, on the school form, in the card to grandparents.
Done well, the two names feel like they belong to the same household without sounding like twins. Here is how to get there.
Match the style, not the sound
Colleen Slagen, a baby name consultant quoted by Opulence Magazine, advises pairing names that tie together in style rather than in sound. Her examples: Brooks and Hudson work better together than Brooks and Banks, and Adeline and Susannah better than Adeline and Caroline. She also notes that names of different lengths pair well, using Ada and Bernadette, and she describes George, Charlotte and Louis as cohesive in their timeless style even though they start and end differently.
That is the idea to keep. A sibling name should answer your first child’s name, not repeat it.
What “style” really means
Style is made of several threads, and you only need two or three of them to match.
Era. Names have curves, and two names with the same curve feel like they came from the same time. Eleanor, Hazel and Henry share one: all three were common around 1900, had low points in the 1980s, and are climbing again. Henry went to about 1 in 45 boys in the 1880s, about 1 in 890 in the 1980s and about 1 in 150 in the 2020s. Mia has a different history: it barely appears before the 1960s and is mostly a name of the last thirty years. A sister Mia and a brother Henry sound fine together, but a sister Eleanor and a brother Henry sound like a set.
Theme. Violet, Lily and Hazel are all in the 2025 girls’ top 25, and all are plants or flowers. Browse the flower girl names and nature girl names lists for more. For boys, Noah, Elijah, Levi, Ezra and Elias are in the 2025 boys’ top 25, and all five are biblical, so the biblical boy names list is a natural shelf to take from. Slagen’s caution is worth keeping in mind: a theme that is too obvious, such as three names that are all colors, can feel forced. Names that are loosely connected, for example by nature, work better than a strict set.
Origin and sound of the language. Names from the same tradition, such as the Hebrew-origin names on our Hebrew origins page, can feel related without sharing sounds.
Formality. A formal name and a short, casual one can sit uncomfortably together. Decide whether you are leaning toward full names or short forms, and check that both children’s names use the same level.
Watch for sound pile-ups
Sound is the trap. Some names are everywhere in the same sounds:
- Endings. Twelve of the top 25 girls’ names of 2025 end in a, including Olivia, Emma, Amelia, Sophia, Mia, Isabella and Ava. If your first daughter is Mia, a second name such as Ava, Luna or Nora gives you a chorus.
- Beginnings. Five of the 2025 top 25 boys’ names start with L: Liam, Lucas, Levi, Luca and Leo. Six of the top 25 girls’ names start with E.
- Near-twins. Names that differ by one sound, like Ella and Bella or Aiden and Caden, are easy to mix up in a hurry. If you call them in the same breath every day, you will also call them by each other’s names.
- Matching initials. Slagen cautions that the habit of giving siblings the same first letter can push parents toward names they do not love or toward unusual spellings, and the pressure carries over to every child after.
Say both names together, in both orders, in a rush. If one gets swallowed by the other, change one.
Weigh the popularity gap
A set where one child has a top-ten name and the other has something almost no one has heard can feel lopsided to the children. That is not a rule, only a conversation to have. By the site’s count, Olivia went to 1 in 231 US babies in 2025 and Louise to 1 in 5,725. The two can still sit together, but you may want to choose that gap on purpose. The guide on how popular is too popular shows how to read these numbers.
Boys and girls
With a brother and sister, match the style and let the sounds differ. Some names are used for both: Rowan ranked 50th among boys and 201st among girls in 2025, and Wren ranked 251st among girls and 630th among boys. A name that works for both can be a bridge when you want a set.
Let your first child’s name guide the search
Vowel’s name pages include a list headed “Parents who love this name also love.” The list for Eleanor starts with Alice, Beatrice, Matilda and Margaret, and the one for Henry with William, Charles, George and Edward. Start with your first child’s name and let those lists show names that tend to go with it.
Keep it loose
Not every set has to match. Many families have siblings whose names have nothing in common, and a reader commenting on a Nameberry newsletter said the names of their own siblings do not match. Slagen reminds parents that children will be their own people once they are grown. Treat a match as a pleasant extra, not an obligation.
Finally, choose the name for the child you are meeting, not for the photo of the pair. If you disagree with your partner about a candidate, how to agree on a baby name has the steps. When you are ready to search, the style quiz is a good way to find names that fit your family’s taste.