Finnish name meaning happiness, luck, or good fortune.
Onni is a Finnish given name of crystalline simplicity and profound meaning. Derived from the Finnish word onni, it translates directly as "luck," "happiness," or "fortune" — a name that is also an ordinary noun, worn daily in the language itself. This quality is characteristic of Finnish naming tradition, which draws heavily from native Finnish vocabulary and from the ancient Kalevala epic tradition, producing names that carry immediate semantic weight in a way that Latin- or Greek-derived Western names often do not.
To be named Onni in Finland is to be literally named Happiness. The name appears in Finnish records from at least the nineteenth century and was quite popular in Finland during the early twentieth century, particularly in the 1920s and 1930s. It belongs to a family of Finnish luck and virtue names alongside Aino (the only one), Toivo (hope), and Taimi (sapling) — names that express something the parent wishes for the child rather than invoking a saint or a dynastic ancestor.
The Kalevala, published in 1835 and compiled by Elias Lönnrot from Finnish oral poetry, sparked a national cultural awakening that made such native Finnish names fashionable and patriotic. Outside Finland, Onni has an appealing cross-cultural accessibility: it is short, symmetrical, easy to pronounce in virtually every language, and carries its meaning visibly on its surface. In the contemporary vogue for short, two-syllable names — Finn, Cleo, Maren, Arlo — Onni fits naturally while carrying genuine linguistic and cultural depth. For parents with Finnish heritage, or simply for those drawn to names that mean something simple and true, Onni offers one of the most direct blessings a parent can give: a name that means the child is already, by existing, a piece of luck.