Grace; favor
Onnika is a rare variant of Annika, which is a Low German and Scandinavian diminutive of Anna. It ultimately derives from the Hebrew name Hannah, meaning grace or favor. While very uncommon in the United States, it offers a unique twist on a classic European diminutive.
Less common today
Onnika isn't in the latest US Top 1000. It last peaked at #10,773 in 2013.
US births per 5-year period, 1990βpresent (SSA data).