Boy Name
Onyx
Onyx is a boy's name whose meaning is not firmly attested in the historical record. It is used as a boy's name across several naming traditions, and it is rare in the United States today — outside the SSA top 1,000.
Considering Onyx? It is a boy name, and ranks in our Rare popularity tier. Phonetically it shares territory with Owens.
Onyx meaning, origin, and usage
Meaning: Onyx has a distinctive sound and evolving modern usage.
Origin: Multiple naming traditions are associated with this name.
Pronunciation: Baby Name Studio pronounces Onyx as O·N·Y·X, with 4 letters and a boy usage profile.
Popularity: According to Baby Name Studio's 2026 tracker, Onyx is an uncommon, standout choice in the Rare tier.
Onyx variants, nicknames, middle names, and sibling names
- Variants and spelling ideas: Onyxa, Onyxe, Onyxy.
- Nicknames: Onyx works as its own nickname.
- Middle names: Pair Onyx with a middle name that balances its short sound; start with the Onyx middle name generator.
- Sibling names: Owens, Omega, Onesimo, Oneal, Oneil — full picks on the sibling names for Onyx guide for a cohesive sibset.
- Similar names: Looking for names that sound like Onyx? Browse our names like Onyx 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 Onyx
What does the name Onyx mean?
Onyx 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 Onyx?
The exact origin of Onyx is debated, but it has been used across multiple naming traditions.
How do you pronounce Onyx?
Onyx has 4 letters and is most commonly stressed on the first syllable.
Is Onyx a boy's or girl's name?
Onyx is primarily used as a boy's name in US records.
How popular is Onyx in 2026?
In our 2026 popularity tracker, Onyx sits in the Rare tier — an uncommon, standout choice.
What names are similar to Onyx?
Names that share Onyx's sound and style include Owens, Omega, Onesimo, Oneal, Oneil.
What middle names pair well with Onyx?
Good middle-name fits for Onyx pair an opposite syllable rhythm: if Onyx is short, lean longer (e.g. classical or three-syllable middles); if Onyx is longer, a one-syllable middle keeps the full name from feeling heavy.
What are good sibling names for Onyx?
Sibling names that pair naturally with Onyx share its rhythm without rhyming — Owens, Omega, Onesimo all sit comfortably alongside it on a shortlist.