Occopirmus ('the first', from Baltic *ūka- 'first' + pirmas 'first') is named as the foremost god, of sky and stars, in the Sudovian Book and Grunau; he heads the enumeration of the Prussian gods.
Domains
sky and the stars
Powers
to preside over the heaven and the stars as the first god
Sources
Wilhelm Mannhardt, Letto-Preussische Götterlehre (Riga: Lettisch-Literärische Gesellschaft, 1936).
Simon Grunau, Preussische Chronik (c. 1517-1526), ed. M. Perlbach et al. (Leipzig: Duncker & Humblot, 1876).