Onnan as a Baby Name. Meaning and Origin of Onnan

What is the meaning of the name Onnan ?

The baby name Onnan is a Unisex name , 2 syllables long and is pronounced OH-nan (ˈoʊnən),ON-nan (ˈɒnæn).

Onnan is in Origin.

Onnan draws on Celtic roots: most plausibly an anglicized form of the early Gaelic Onnán, built from onn “ash tree” plus the diminutive -án, yielding the sense “little ash” or “ash sapling.” The ash tree has long been a symbol of resilience and craftsmanship across the Gaelic and Brythonic world; cognates include Welsh onnen and Breton onn, reinforcing the nature-based meaning.

Though exceedingly rare, Onnán fits the medieval Irish pattern of affectionate diminutives (cf. Ciarán, Senán) and surfaces today as a heritage revival in Ireland, Scotland, and the diaspora. Variants and related forms include Onnán (Irish), Onnan (English), and the Welsh nature-name Onnen; the lookalike Onan/Onán is a separate Biblical name with different Hebrew roots. Short forms such as Onn are possible, and the name’s woodland imagery aligns with contemporary preferences for ecologically themed names.

⚙ Onnan is an extremely rare name. Across our dataset of national birth registries and international name records, Onnan appears only 2 times in total — found in 1 country. If you're considering it, you'd be giving your child a name almost nobody else has.