MallowbyNames

Heidy

HY-dee · Of uncertain origin, possibly a variant of Heidi, itself a diminutive of Adelheid (German for 'noble kind') or derived from the name Heidrun (Old Norse 'heath' + 'secret lore').

2025 rank (girls)
#1,911
Babies named in 2025
101
Peak popularity
2010
2025 frequency
1 in 15,914 girls
Usually for
Girls
Trend
Declining since 2009

Declining since 2009, #1,911 for girls today.

Popularity of Heidy since 1955

Babies named Heidy per year in U.S. Social Security records.

1132253381960198020002020Most births 2010Girls
Data table (by decade)
DecadeGirls
1950s33
1960s95
1970s162
1980s316
1990s885
2000s2,169
2010s1,768
2020s657

Meaning & origin

Heidy is a spelling variant of Heidi, a name that rose to prominence through children's literature. In the U.S., Heidy was first recorded in 1955, and its popularity peaked in 2010. Since 2009, its usage has been declining. In 2025, the name ranked 1,911th with a frequency of 1 in 15,914 births. The name is most common in New York, Georgia, and California. While connected to the well-known Heidi, the Heidy variant offers a slightly more distinctive spelling that has maintained modest but steady usage over decades.

Heidy is primarily a spelling variant of Heidi, a German diminutive of Adelheid, which derives from the Old High German elements 'adal' (noble) and 'heit' (kind, sort). Heidi gained international recognition through Johanna Spyri's 1880 novel 'Heidi'. The variant Heidy may also be influenced by Scandinavian names beginning with 'Heid-', such as Heidrun from Old Norse 'heiðr' (heath) and 'rún' (secret lore).

Where Heidy is most popular

Births per 100,000 girls by state. Press play or drag the slider to watch it move across the decades. The lightest shade means too few recorded births.

2020s
Fewermore per 100k girlstoo few births

Nicknames & variants

Nicknames: Heidi

Variants: Heidi, Heydi, Heidee

Sibling names for Heidy

Names that share Heidy's style, for a brother or sister.

Sisters: Emma, Anna, Clara, Sophie, Mia

Brothers: Liam, Noah, Ethan, Oliver, Lucas

A parent animal hugging its little one, the personalized name page

H is for Heidy, our favorite little girl.

H is for Heidy…”

In a Mallowby alphabet book, Heidy's letter becomes Heidy's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Heidy's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What does the name Heidy mean?
Heidy is a variant of Heidi, typically understood as a diminutive of Adelheid, meaning 'noble kind' in German. Its exact meaning is uncertain for this spelling.
How popular is the name Heidy?
Heidy ranked 1,911th in the U.S. for girls in 2025, with about 1 in 15,914 newborns given the name. Its peak popularity was in 2010.
Is Heidy a unisex or a girl name?
Heidy is almost exclusively used as a girl's name, consistent with its derivation from Heidi.