Names like Billy include alternative spellings such as Billie, longer forms like William, Willard and Gwilym, short forms like Liam, Bill and Lyam, and rhyming names like Lily, Millie and Tilly.

Overall

1. Lily (Lillie, Lilly, Lili, Lilli, Lilie, Lilley, Lillee, Liley)
2. Willie (Willy, Willey, Wyllie, Willi)
3. Millie (Milly, Milli, Mili, Milley)
4. Liam
5. Tilly (Tillie, Tilley, Tilli, Tili)
6. Willis
7. Lyam
8. Rylee
9. William
10. Pim

Longer forms

• William
• Willard
• Gwilym
• Willis
• Guglielmo

Short forms

• Liam
• Bill
• Lyam
• Pim

Related short forms

• Will, Wil
• Wills
• Willie, Willy, Willey, Wyllie, Willi

Rhyming names

• Lily, Lillie, Lilly, Lili, Lilli, Lilie, Lilley, Lillee, Liley
• Millie, Milly, Milli, Mili, Milley
• Tilly, Tillie, Tilley, Tilli, Tili
• Willie, Wyllie, Willy, Willi, Willey
• Rylee

Alliterative names

Names that start with similar sounds to billy

• Bisma

Other names that contain similar sounds

• Bibi
• Brynley, Brinley
• Bailey, Bayley, Bayleigh, Baylee, Bailee, Baillie, Baily, Bailie, Bailly
• Bilaal
• Lillia

Names with similar tags

Tags include origins, well known people etc

• James
• Corey
• Lewis
• Kaia
• Peyton
• Emerson
• Caelan
• Presley
• Tory
• Jewel

Names with similar locations

Compares geographical origins and national popularity

• Joaquin
• Otis
• Linda
• Julie
• Ross
• Ivan
• Nora
• Marion
• Shawn
• Hector

Names popular in similar years

Looks for trends from data about name popularity across the decades

• Samuel
• James
• Michael
• Daniel
• David
• Elizabeth
• Thomas
• Edward
• Joseph
• George