Jaci

/JH-AA-K-IH/

Unisex Christian Portuguese origin BrazilianIndigenous

Moon (Tupi-Guarani) — Jaci (Tupi-Guarani, from yacy 'moon') is the moon-goddess of Tupi-Guarani mythology, beloved of the sun-god Guaraci. Their nightly meeting in the sky's brief twilight produces the stars (caraca). A unisex Tupi name evoking lunar mythology and indigenous Brazilian cosmology.

See Jaci scored for your family

Meaning & origin

Jaci is a unisex's name of Portuguese origin, traditionally used in Christian families. The name means "Moon (Tupi-Guarani) — Jaci (Tupi-Guarani, from yacy 'moon') is the moon-goddess of Tupi-Guarani mythology, beloved of the sun-god Guaraci. Their nightly meeting in the sky's brief twilight produces the stars (caraca). A unisex Tupi name evoking lunar mythology and indigenous Brazilian cosmology." and belongs to the Light cluster — names meaning radiance, illumination, and hope.

Common among Brazilian, Indigenous, Portuguese families, Jaci carries cultural weight that goes beyond its dictionary definition — it's a name with a story and a community.

Numerology of Jaci

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 Jaci resonates in either tradition.

Pythagorean
5
freedom and adventurous change
Chaldean
6
nurturing and family devotion

How Jaci sounds

NameRoot scores the phonetic fit of every name against the sound of your last name. The pronunciation of Jaci breaks down into 4 phonemes: /JH-AA-K-IH/. In the app, you'll see how those sounds flow with your family name across rhythm, stress, and consonant clusters.

The six signals, applied to Jaci

NameRoot scores every name across six independent dimensions. Here's how Jaci maps to each — install the app to see the full compatibility score for your specific family.

01 — Birth Star
Nakshatra match
Enter your baby's birth date in the app and we'll compute the nakshatra compatibility score.
02 — Numerology
Destiny alignment
Pythagorean and Chaldean life-path calculations (destiny 5) matched against your family's own numerology profile.
03 — Phonetics
Last-name fit
Rhythm, stress, and consonant clusters measured with IPA to see how Jaci flows with your family name.
04 — Meaning
Light
Jaci belongs to the Light cluster — names meaning radiance, illumination, and hope.
05 — Cultural & Tradition
Christian
As a Christian name, Jaci carries religious and cultural weight scored against your family's heritage — plus grandparent-name matches, saint's-day alignment, and generational naming patterns scored against your family tree.
06 — Uniqueness
Popularity balance
How common Jaci is today versus historically — finding the sweet spot between familiar and forgotten.

Names similar to Jaci

If Jaci 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 Brazilian families

Tonalli
Soul, spirit, day (Nahuatl) — Tonalli (Nahuatl tōnalli 'day, soul, fate') is one of the foundational Aztec/Nahuatl concepts. The tonalli is the soul-essence connected to the sun (tonatiuh) and the day of birth — Aztec sacred-calendar tonalpohualli derives from this root. A unisex Mexican-pride name evoking pre-Columbian spiritual cosmology.
Pindorama
Land of palms (ancient Tupi name for Brazil) — Pindorama (Tupi-Guarani, from pindó 'palm tree' + rama 'place of') is the indigenous-Tupi name for what is now Brazil — meaning 'land of palms.' The name predates the Portuguese arrival and is increasingly used by Brazilian indigenous-rights movements as the original name of the land. A unisex name evoking Brazilian indigenous identity.
Luca
Light-giving, the Italian form that crosses gender boundaries with effortless Mediterranean grace — Luca is Luke softened by Italian vowels into a name equally at home on a son or a daughter. It carries the warmth of southern European sunshine, the artistic heritage of a culture that elevated beauty to a moral principle, and the international ease of a name that needs no translation
Riley
A major American cross-gender favorite with very strong current household normalization

Sharing the same meaning

Other Christian unisex names from the Light cluster

Bintang
Star — Bintang (Indonesian, from Sanskrit-Indonesian bintang 'star') is the Indonesian word for star. The Bintang Mahaputra is one of Indonesia's highest civilian honors, awarded for exceptional service to the nation. A pan-Indonesian unisex name evoking radiance and aspiration.
Ember
A glowing coal, the last persistent heat after the flames have died — Ember names a child for the quiet stage of fire, the red-gold glow that remains when the drama of the blaze is over.
Seren
It is soft-spoken and luminous, a name that glows rather than blazes and that carries its Celtic heritage with understated pride

Names that sound similar

Christian unisex names that open with the same syllables as Jaci

Jordan
The descending river, the sacred waters in which Jesus was baptised
Jesse
Gift, wealthy, the root from which the royal line of David grew — Jesse is the father of King David, and the 'root of Jesse' became a central image in Christian art and prophecy, the family tree from which the Messiah would spring
Jamie
Supplanter, from Hebrew Ya'aqov via James. One of the few names equally at home on any gender

Common questions about Jaci

What does the name Jaci mean?

Jaci means "Moon (Tupi-Guarani) — Jaci (Tupi-Guarani, from yacy 'moon') is the moon-goddess of Tupi-Guarani mythology, beloved of the sun-god Guaraci. Their nightly meeting in the sky's brief twilight produces the stars (caraca). A unisex Tupi name evoking lunar mythology and indigenous Brazilian cosmology.." It is a unisex name of Portuguese origin, traditionally used in Christian families.

Is Jaci a boy or girl name?

Jaci is a unisex name, used for any gender.

What is the origin of the name Jaci?

Jaci is of Portuguese origin, used in Christian tradition, commonly among Brazilian, Indigenous, Portuguese families.

What is the numerology of Jaci?

Jaci has a Pythagorean destiny number of 5 — freedom and adventurous change.

See how Jaci scores for your family

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