Jaromir m. Slavic Jarilo, the name of a god of vegetation, fertility, and springtime, from Proto-Slavic *jaro, *jarъ, *jarь, *jara 'spring (season)' + Slavic mir, měr, mierz, myr 'peace'.
The name of an 11th C duke of Bohemia, a 12th-13th C prince of Rügen and two 13th C princes of Rügen.
Jaromar is Polabian form.