Gillian vs Olivia

Baby Name Comparison — 2026

Popularity Comparison

Gillian Rank #3,126
Olivia Rank #1

Olivia is more popular, ranked #1 vs #3126 for Gillian.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Gillian ___

  • Gillian Rose
  • Gillian Anne
  • Gillian Claire
  • Gillian Marie
  • Gillian Hope
  • Gillian Grace

Olivia ___

  • Olivia Rose
  • Olivia Grace
  • Olivia Jane
  • Olivia Mae
  • Olivia Claire
  • Olivia Jade

Sibling Name Ideas

Names that pair well as siblings.

If you choose Gillian

Alison Sheila Colin Duncan Fiona

If you choose Olivia

Liam Noah Charlotte Emma Sophia

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Gillian or Olivia more popular?

Olivia is more popular, ranked #1 compared to Gillian at #3126 in the United States.

What do Gillian and Olivia mean?

Gillian means "youthful" (Latin origin). Olivia means "olive tree" (Latin origin).

Are Gillian and Olivia boy or girl names?

Gillian is primarily a girl name. Olivia is primarily a girl name.

More Comparisons

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← Full profile: Gillian ← Full profile: Olivia Browse all baby names