MallowbyNames

Josaiah

jo-ZAY-uh · Often regarded as a variant of Josiah, meaning 'the Lord supports' or 'God heals,' though its exact meaning is uncertain.

2025 rank (boys)
#6,143
Babies named in 2025
14
Peak popularity
2008
2025 frequency
1 in 122,005 boys
Usually for
Boys
Trend
Declining since 2007

Declining since 2007, #6,143 for boys today.

Popularity of Josaiah since 1996

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

81725200020102020Most births 2008Boys
Data table (by decade)
DecadeBoys
1990s29
2000s162
2010s169
2020s83

Meaning & origin

Josaiah is a modern spelling variant of the biblical name Josiah, which has deep roots in Hebrew tradition. The name first appeared in U.S. records in 1996 and reached its peak rank of 6,143 in 2008, with a usage rate of about 1 in 122,005 newborns that year. Since 2007, its popularity has been gradually declining. While Josaiah has not been as widely adopted as its source name Josiah, it reflects a trend toward distinctive spellings of classic names. The name is almost exclusively given to boys and has not shown strong regional preferences in the United States.

Josaiah is a modern variant of the biblical name Josiah, which is derived from the Hebrew Yoshiyahu, meaning 'Yahweh supports' or 'God heals.' The name Josiah appears in the Old Testament as a king of Judah known for his religious reforms. Josaiah gained modest usage in the United States from the late 1990s onward, likely as a phonetic or spelling variation of the more established Josiah.

Nicknames & variants

Nicknames: Jo, Joe, Siah

Sibling names for Josaiah

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

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

J is for Josaiah, our favorite little boy.

J is for Josaiah…”

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

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Questions parents ask

What does the name Josaiah mean?
Josaiah is often considered a variant of Josiah, meaning 'the Lord supports' or 'God heals,' though its exact meaning is unclear.
How popular is Josaiah?
In 2025, Josaiah ranked 6,143 in the United States, with about 1 in 122,005 newborns given the name. Its peak popularity was in 2008.
Is Josaiah a boy's name or a girl's name?
Josaiah is predominantly used as a boy's name.