For this Hjalmar Fredrik there are 2 different names on Yasni.
In the ranking of the most common first names Hjalmar Fredrik is on position 4589.
Male first name (Scandinavian): Hjalmar, helmeted warriors, Norse (two-part name); hjalmr = helmet; arr = the warriors
Male first name (Scandinavian): Fredrik, Old High (two-part name); Fridu = peace, protection, security, rihhi = rich, powerful, power, rule, ruler, old German two-part name, in the Middle Ages known as name various German rulers as Frederick the Great (18th century)