Female and male first names beginning with the letter “O”..

Scandinavian female name derived from Áleifr, meaning 'noble heir' or 'noble descendant'.

Unique African American name coined by blues legend Huddie 'Lead Belly' Ledbetter.

African name from Nigeria's Igbo tribe meaning "the sun has risen" or "the sun is shining," reflecting beauty, warmth, and new beginnings.

Unique girls' name of Slavic origin, derived from the Russian word 'oleg', meaning 'holy'. Despite its boyish counterpart Oleg, Oледа has been adopted as a variant for girls, carrying deep religious symbolism.

Rare yet captivating Greek name that means "all" or "whole".

Rare yet meaningful Greek name derived from 'ōléa', meaning olive, symbolizing peace and wisdom.

Unique Irish given name derived from the surname Ó hEidhin, meaning 'descendant of Eidin', which translates to 'little fire' or 'spark'.

Captivating feminine name of African origin derived from the Ashanti people of Ghana, meaning "she has a beautiful heart".

Slavic name derived from the Old Norse "Helgi", meaning "sacred" or "holy".

Rare, Spanish-derived name meaning 'like an olive tree'.

Popular Ukrainian masculine given name of Slavic origin, derived from "oleh", meaning "light" or "fire".

Unique Scandinavian female name derived from Old Norse Álfhildr meaning "elf battle," associated with magical powers in folklore.

Polish boys' name derived from "olej," meaning "oil." It was traditionally given to intelligent boys or those with oil industry ties.

Traditional Ukrainian male name of Greek origin, meaning 'defender of mankind'.

Ukrainian male name derived from ancient Greek Alexios, meaning "defender" or "helper".

Igbo Nigerian name meaning "wealth has arrived".

Unique Scandinavian name derived from the Old Norse Áleifr, meaning "every warrior" or "all-warrior," popular among historic Viking warriors and explorers like Leif Erikson's companion Áleifr Eiríksson.

Distinctive yet uncommon given name with unknown origins and meaning, believed to have emerged in mid-20th century America without a widely accepted etymology or significance. Some sources suggest it may be a variant of Welsh-origin Allen ('little rock' or 'handsome'), but this remains unconfirmed. The name has never ranked among the top 1,000 most popular boy names in the U.S., yet its uniqueness continues to appeal to parents seeking uncommon names for their children.

Unique Ukrainian female given name derived from Oleksandra, meaning "defender" or "protector".

Olenna is a rare yet elegant Greek-derived name meaning 'olive tree', symbolizing peace and wisdom.

Welsh-derived feminine name meaning "youth," originally the masculine Owain, associated with powerful Prince Owain Gwynedd of Wales (1103-1170).

Distinctive Norwegian boy's name, derived from Old Norse 'Óleifr', meaning 'elf-like'.

Popular Ukrainian name of ancient Slavic origin, meaning "holy" or "light", associated with nobility and resistance throughout history.

Slavic given name of Ukrainian origin, derived from Oleksiy, which means 'defender' or 'protector'. It has been popularized by influential Ukrainian writer Oleksandr Dovzhenko, who used the pen name Olesha.

Unique Ukrainian female name derived from the Greek Helen, meaning 'torch' or 'corposant', popularized through Homer's Iliad.

Distinctive given name of Spanish origin, derived from "olestero," meaning "greasy" or "oily." Though uncommon today, it was popular among Spanish descent families in the 19th-20th centuries and has been carried by notable figures like Jamaican cricketer Olester Harris.

Ukrainian female name derived from Helen, meaning 'torch' or 'corposant', interpreted as 'light' in Slavic cultures.

Unique and beautiful name of Spanish origin, derived from the Spanish word "ole" which means "wave.

Rare African American name combining Olivia ("olive tree," peace, beauty) and Letitia ("happy," joyful), with possible influence from Alethea ("truth").

Rare Greek-derived female name rooted in ancient mythology's Lethe river of forgetfulness, though its exact meaning remains open to interpretation.

Unique Greek female given name derived from 'olethros', meaning destruction or ruin. It was borne by an Oceanid nymph in ancient Greek mythology, granting it a powerful and captivating aura.

Italian name derived from 'olea', meaning olive, symbolizing peace and fertility.

Scandinavian female name derived from Old Norse Álfrún, meaning "elf-rune".

Rare Scandinavian name derived from 'olfr', meaning wolf, and 'geirr', meaning spear, reflecting ancient Viking strength and courage.

Distinctive male name of Ukrainian origin, derived from Oleksandr meaning "defending men". It has been popular in Ukraine for centuries and is still widely recognized today.

Captivating Greek name meaning "defender of mankind.

Rare German name meaning "from the meadow" or "of noble descent".

Uncommon yet distinct name of Irish origin, derived from Ó Laoidh meaning 'descendant of Laidh,' the personal name translating to 'shielder' or 'protector.'

Slavic feminine name derived from Old Norse Helga, meaning 'sacred' or 'holy', associated historically with figures like Grand Princess Olga of Kiev who converted Kievan Rus' to Christianity.

Slavic female name derived from Old Norse Helga, meaning "holy" or "consecrated.