Thaddius
Boy nameThaddius has been given to 593 babies in the U.S. since 1916. It peaked in 1989.
Popularity over time births per year, 1880–2025
Total babies
593
Peak year
1989 (18 babies)
Rank in 2025
Below top 1000
First recorded
1916
10-year trend
New / returning
Gender split
All boys
Spellings & variants
Names one letter away from Thaddius — alternate spellings parents actually use.
Names with a similar vibe
Same primary gender, peaked around the same years, and roughly as common as Thaddius.
Sibling name ideas for Thaddius
Same era and popularity as Thaddius, avoiding matching initials or rhymes.
FAQ
How popular is the name Thaddius?
Thaddius has been given to 593 babies in the U.S. since 1916. It ranked below the top 1000 in 2025.
When did the name Thaddius peak?
Thaddius peaked in 1989, when 18 babies were given the name.
Is Thaddius a girl or boy name?
Thaddius is primarily a boy name (100% of babies named Thaddius are boys).
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