Cydney vs Declan

Baby Name Comparison — 2026

Cydney

Girl #8,132 Most Popular 2 Syllables

Meaning

"wide island"

Origin: Old English

Cultural Roots

English Australian American

Quick Stats

Popularity Rank
#8,132
Total SSA Count
14
Syllables
2
Formality
Casual
Nicknames
Cyd, Syddie

Playground Safety Score

✓ All Clear
Full profile for Cydney →

Declan

Boy #131 Most Popular 2 Syllables

Meaning

"man of prayer"

Origin: Irish Gaelic

Cultural Roots

Irish English American

Quick Stats

Popularity Rank
#131
Total SSA Count
2,758
Syllables
2
Formality
Moderate
Nicknames
Dec, Decs

Playground Safety Score

✓ All Clear
Full profile for Declan →

Popularity Comparison

Cydney Rank #8,132
Declan Rank #131

Declan is more popular, ranked #131 vs #8132 for Cydney.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Cydney ___

  • Cydney Grace
  • Cydney Mae
  • Cydney Ann
  • Cydney Leigh
  • Cydney Renee

Declan ___

  • Declan James
  • Declan Patrick
  • Declan Michael
  • Declan Ryan
  • Declan Thomas
  • Declan Cole

Sibling Name Ideas

Names that pair well as siblings.

If you choose Cydney

Taylor Madison Tyler Jordan Logan

If you choose Declan

Finn Liam Siobhan Aoife Rowan

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 Cydney or Declan more popular?

Declan is more popular, ranked #131 compared to Cydney at #8132 in the United States.

What do Cydney and Declan mean?

Cydney means "wide island" (Old English origin). Declan means "man of prayer" (Irish Gaelic origin).

Are Cydney and Declan boy or girl names?

Cydney is primarily a girl name. Declan is primarily a boy name.

More Comparisons

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← Full profile: Cydney ← Full profile: Declan Browse all baby names