1770+ Boy Names Ending in O

Renaldo is a masculine name with Latin and Spanish origins, being a variation of Reynaldo and Ronald. These names ultimately derive from the Old Norse 'Rögnvaldr,' combining 'regin' (advice, decision) and 'valdr' (ruler). Renaldo gained popularity in Spanish-speaking countries and Italian communities, offering a romantic, melodious alternative to the more common Ronald. In the United States, it saw modest usage during the mid-20th century, particularly among Hispanic Americans. The name evokes a charismatic and passionate character, often associated with Latin culture. Well-known bearers include Brazilian footballer Ronaldo, often called Renaldo in some regions, contributing to the name's athletic associations.

Ummo is a masculine name of rare usage and obscure origins. It may have connections to various cultural sources, potentially deriving from African or Northern European naming traditions. The name's distinctive double 'm' creates a strong central sound, giving it a bold, memorable quality. Ummo remains exceptionally uncommon in most naming records worldwide, making it a truly distinctive choice. The brevity of the name—just two syllables and four letters—gives it a punchy, modern quality despite its potential ancient roots. Due to its rarity, Ummo carries little cultural or historical baggage, allowing it to be interpreted freshly. Parents seeking a genuinely unique name might be drawn to Ummo for its simplicity combined with its unfamiliarity in most naming contexts.

Axel Santiago combines Nordic and Spanish heritage in one distinctive name. Axel, derived from the biblical name Absalom, means "father of peace" and has Scandinavian origins, popularized by Danish author Axel Fredrik. Santiago, Spanish for Saint James, is traditionally a surname or given name in Hispanic culture. This cross-cultural combination has gained popularity among parents seeking unique yet meaningful names with international appeal. The name projects strength and individuality while offering versatile nickname options. In recent years, Axel Santiago has become increasingly common in multicultural communities and among families honoring diverse heritage traditions.

Oscarito is a charming Spanish diminutive form of Oscar, adding the suffix "-ito" which conveys endearment and smallness. The name Oscar itself has Norse origins meaning "divine spear" or "God's spear." Oscarito is particularly popular in Latin American countries, especially in Mexico and Brazil, where diminutive forms are commonly used as given names to express affection. This name carries a warm, friendly quality while maintaining the strength of its root name. Though not widely used in English-speaking countries, Oscarito offers a melodic alternative to the more formal Oscar, bringing a sense of playfulness and cultural connection to Hispanic heritage.

Junípero is a masculine name of Spanish origin derived from the Latin word 'juniperus,' meaning 'juniper tree.' The name gained historical significance through Junípero Serra, an 18th-century Spanish Franciscan friar who established missions throughout California. While uncommon in mainstream usage, the name carries botanical symbolism, as juniper trees represent protection and purification in various traditions. Its distinctive Spanish flair offers parents a rare choice with historical depth and natural imagery. The name features a melodic quality with its rhythmic four syllables and accent on the second syllable. Though not appearing on popular naming charts, Junípero occasionally sees use in Spanish-speaking regions and among families drawn to its unique heritage and ecclesiastical connections.

Isdro is an uncommon masculine name likely derived as a variation of Isidro or Isidore, which comes from Greek origins meaning 'gift of Isis.' Though rare in contemporary usage, the name carries connections to Saint Isidore of Seville, a respected 7th-century scholar and Doctor of the Church. This shortened variant offers a distinctive twist on the traditional name while maintaining its historical essence. Isdro has a strong, concise sound with its two syllables and distinctive consonant blend. The name remains extremely rare in English-speaking countries but may be occasionally found in Hispanic communities. Its uniqueness makes it stand out while still having legitimate historical roots, appealing to parents seeking an uncommon name with authentic heritage and a streamlined, modern feel.

Pasco is a masculine name with multiple cultural origins. Primarily, it derives from the Latin 'Pascha' meaning 'Easter' or 'Passover,' making it traditionally associated with boys born during the Easter season. It's also a Cornish place name and surname. In Spanish-speaking regions, Pasco can be a variation of Pascal or Pascual, again with Easter connections. The name has maintained steady though uncommon usage throughout history, particularly in Mediterranean countries, Cornwall, and Latin America. With its distinctive two-syllable structure and strong 'o' ending, Pasco offers a masculine sound that's both traditional and uncommon. Its appeal lies in its cross-cultural connections, religious significance, and balance of uniqueness and historical grounding.

Serafino is a masculine Italian name derived from the Hebrew word 'seraphim,' referring to a category of celestial beings described as fiery, six-winged angels in biblical tradition. The name carries strong religious connotations of purity, devotion, and heavenly protection. Serafino has been used in Italy for centuries, particularly in Catholic families. Outside of Italy and Italian diaspora communities, the name remains relatively uncommon, giving it an exotic and distinctive quality. The feminine equivalent is Serafina. The name has a melodious quality with its flowing vowels and rhythmic syllables. Notable bearers include various Italian saints and cultural figures, reinforcing its connection to Italian heritage and Catholic traditions.