Boy Name · Greek Origin
Theodor
Theodor is a boy's name whose meaning is not firmly attested in the historical record. It is a boy's name of Greek origin, and it is rare in the United States today — outside the SSA top 1,000.
Origin and meaning: English Wiktionary (CC BY-SA 4.0). Popularity: US Social Security Administration.
Theodor — a boy name from the Greek tradition — is an uncommon, standout choice. If Theodore is on your shortlist, Theodor belongs in the same conversation.
Theodor meaning, origin, and usage
Meaning: Theodor has a distinctive sound and evolving modern usage.
Origin: Greek naming roots help connect Theodor to related Greek baby names.
Pronunciation: Baby Name Studio pronounces Theodor as T·H·E·O·D·O·R, with 7 letters and a boy usage profile.
Popularity: According to Baby Name Studio's 2026 tracker, Theodor is an uncommon, standout choice in the Rare tier.
Theodor variants, nicknames, middle names, and sibling names
- Variants and spelling ideas: Theodora, Theodore, Theodory, Theodo.
- Nicknames: Theo and T.
- Middle names: Pair Theodor with a middle name that balances its substantial sound; start with the Theodor middle name generator.
- Sibling names: Theodore, Theadore, Teodoro, Theodora, Teodora — full picks on the sibling names for Theodor guide for a cohesive sibset.
- Similar names: Looking for names that sound like Theodor? Browse our names like Theodor guide for phonetic-neighbor picks.
- Explore more: use the Baby Name Explorer, name search, AI name generator, and Baby Name Studio homepage.
Frequently asked about Theodor
What does the name Theodor mean?
Theodor has no single meaning that is firmly attested in the historical record. It is used as a boy name in US birth records, and parents usually choose it for its sound rather than a documented meaning.
What is the origin of Theodor?
Theodor originates in Greek naming tradition.
How do you pronounce Theodor?
Theodor has 7 letters and is most commonly stressed on the first syllable.
Is Theodor a boy's or girl's name?
Theodor is primarily used as a boy's name in US records.
How popular is Theodor in 2026?
In our 2026 popularity tracker, Theodor sits in the Rare tier — an uncommon, standout choice.
What names are similar to Theodor?
Names that share Theodor's sound and style include Theodore, Theadore, Teodoro, Theodora, Teodora.
What middle names pair well with Theodor?
Good middle-name fits for Theodor pair an opposite syllable rhythm: if Theodor is short, lean longer (e.g. classical or three-syllable middles); if Theodor is longer, a one-syllable middle keeps the full name from feeling heavy.
What are good sibling names for Theodor?
Sibling names that pair naturally with Theodor share its rhythm without rhyming — Theodore, Theadore, Teodoro all sit comfortably alongside it on a shortlist.