Onyx

/OW-N-Y-K/

Unisex Christian English origin AmericanBritish

Black gemstone, claw — Onyx (Greek ónyx 'claw, fingernail') names a child after the deep black gemstone, used in jewelry and ritual since antiquity. A modern surging unisex name.

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Quick — what every Christian parent asks about Onyx:

🕯️ Onyx's patron saint & feast day? 🤝 Will you and your partner agree on Onyx? 💗 Does Onyx's meaning match your hopes? 🔊 Does Onyx go with siblings? 👶 Is Onyx right for your baby?
The answer to all of it — NameRoot Onyx, scored for your family & heritage — free.
The one thing this page can't tell you

How well does Onyx fit your family?

This page tells you what Onyx means. The app tells you whether it's right for your baby — scored against your family & your heritage, and your baby's birth details.

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NameRoot scoring a name across six signals — phonetics, numerology, birth star, culture, meaning and uniqueness

Six signals — scored for your family & heritage, not in the abstract:

🌟
Birth starAuspicious for your baby?
🔢
NumerologyDestiny 6, matched to you
🔊
PhoneticsSounds right with siblings?
💗
MeaningThe Beauty cluster
🛕
HeritageWill grandparents approve?
✨
UniquenessCommon, or one-of-a-kind?

Meaning & origin

Yes — Onyx is a Christian unisex name of English origin, meaning “Black gemstone, claw — Onyx (Greek ónyx 'claw, fingernail') names a child after the deep black gemstone, used in jewelry and ritual since antiquity. A modern surging unisex name.”.

Onyx is a unisex's name of English origin, traditionally used in Christian families. The name means "Black gemstone, claw — Onyx (Greek ónyx 'claw, fingernail') names a child after the deep black gemstone, used in jewelry and ritual since antiquity. A modern surging unisex name." and belongs to the Beauty cluster — names that carry grace, elegance, and aesthetic wonder.

Common among American, British, Greek families, Onyx carries cultural weight that goes beyond its dictionary definition — it's a name with a story and a community.

The patron saint & feast day behind Onyx

Many Christian names carry a patron saint and a feast day (name day) — a tradition of choosing a name for the saint a child is born near, or one the family holds dear. Onyx lives in this tradition of meaning and heritage.

An AI baby portrait and family score in the NameRoot app

NameRoot connects the dots. See Onyx's patron saint, its feast day, and whether it aligns with your baby's birth — alongside its full family score.

See Onyx's saint & feast day →

What does Onyx's numerology say?

Numerology assigns each name a single-digit destiny number by summing its letter values. Different schools use different mappings — NameRoot computes both so you can see how Onyx resonates in either tradition.

Pythagorean
6
nurturing and family devotion
Chaldean
9
compassion and humanitarian service

Onyx's destiny number is 6 — but a number only matters in context. The app matches it to your family's own numbers for a real compatibility read. See Onyx's full reading →

Does Onyx go with your family's names?

Onyx breaks into 4 sounds: /OW-N-Y-K/. The real test isn't how it sounds alone — it's how it sounds beside the names already in your family: yours, your partner's, and any brothers or sisters. NameRoot scores that harmony, so Onyx sits naturally next to a Mum and Dad like Michael & Anna, or a big sister named Gianna — no awkward clashes, no two names that blur together. Hear Onyx beside your family's names →

Names similar to Onyx

If Onyx resonates with you, these names live in the same world — drawn from the same tradition, sharing the same meaning, or echoing a similar sound.

From the same tradition

Other Christian unisex names, common in American families

Riley
Courageous, valiant — from the Irish Ó Raghallaigh, meaning brave. A surname turned given name, now embraced for both boys and girls.
Nico
Victory of the people, compressed into a name as quick and bright as a struck match — Nico is the pan-European short form of Nicholas and Nicole, carrying the Greek concept of popular triumph in two vivid syllables. It sounds at home in Rome, Amsterdam, and Buenos Aires, a name that belongs to no single country because it belongs to the spirit of celebration itself
Skylar
From Dutch 'Schuyler' (scholar, shelter). American adaptation. Used for all genders since 1990s
Jordan
The descending river, the sacred waters in which Jesus was baptised

Sharing the same meaning

Other Christian unisex names from the Beauty cluster

Teagan
Little poet, from the Irish Tadhgan, a diminutive of tadhg meaning poet or philosopher, and read also with the sense of beautiful. An Irish name carried widely into English use, it joins the small endearing form to the honoured figure of the bard, naming the bearer a maker of verse.
Leighton
A settlement by the leek garden or herb meadow. From the Old English leac (leek, plant) and tun (enclosure, town), it began as a place-name and surname before crossing into given-name use, where its two-beat flow now reads gracefully for a child of any gender.
Siru
Small fragment or flake, from the Finnish siru, a tiny piece or speck. As a feminine name it carries an affectionate sense of something small and precious, in keeping with a Finnish habit of choosing short, plain nature-words that feel intimate and tender rather than grand.

Names that sound similar

Christian unisex names that open with the same syllables as Onyx

Oakley
Oak meadow, the clearing in the ancient forest where the strongest trees meet open sky — Oakley names a child for the boundary between deep woods and sunlit field, the place where the sturdiest English tree grows at the edge of cultivated land
Oleander
The Mediterranean flowering shrub whose beauty conceals a lethal secret — Oleander is the evergreen shrub that lines every Italian highway and Greek island road, its pink and white blossoms among the most beautiful in the Mediterranean, while every part of the plant is fatally poisonous
Oghene
God, the supreme creator in the Urhobo spiritual tradition of southern Nigeria — Oghene is the Urhobo word for the supreme deity, used as a name prefix in compounds and increasingly as a standalone name among Nigerian Christians. It carries the theological weight of an indigenous African concept of monotheism that predated European missionary contact, the Niger Delta's cultural richness, and the pan-African movement to reclaim pre-colonial spiritual vocabulary

Explore more names

Keep exploring names like Onyx — by tradition, by meaning, or by first letter.

Christian unisex namesNames that mean beautyNames starting with O All baby names

Common questions about Onyx

What does the name Onyx mean?

Onyx means "Black gemstone, claw — Onyx (Greek ónyx 'claw, fingernail') names a child after the deep black gemstone, used in jewelry and ritual since antiquity. A modern surging unisex name.." It is a unisex name of English origin, traditionally used in Christian families.

Is Onyx a boy or girl name?

Onyx is a unisex name, used for any gender.

What is the origin of the name Onyx?

Onyx is of English origin, used in Christian tradition, commonly among American, British, Greek families.

Is Onyx a Christian name?

Yes. Onyx is a unisex name traditionally used in Christian families, of English origin.

What does Onyx mean in English?

Onyx originates from English, where it means "Black gemstone, claw — Onyx (Greek ónyx 'claw, fingernail') names a child after the deep black gemstone, used in jewelry and ritual since antiquity. A modern surging unisex name.."

What is the numerology of Onyx?

Onyx has a Pythagorean destiny number of 6 — nurturing and family devotion.

See how Onyx scores for your family

NameRoot is the only baby-name app that scores every name across 6 signals against your specific family context. Download free — Onyx is waiting.

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