Modern invention, likely combining Jan and Nautica
Janautica is a modern American coinage. It likely blends the traditional name Jan, a diminutive of Janet or Jane, with the rhythmic suffix -autica, possibly inspired by the brand name Nautica or the Latin root for 'ship' or 'sea'.
Less common today
Janautica isn't in the latest US Top 1000. It last peaked at #6,471 in 1999.
US births per 5-year period, 1990βpresent (SSA data).