- Eva Helenius
(b ?1741; d 1813). Swedish maker of clavichords, harpsichords, and square pianos, active in Stockholm. He apprenticed in carpentry (1764–69) with the master Lars Fogelberg, then became a journeyman and turned to keyboard instrument making, working first with Gottlieb Rosenau, who taught him ‘more urgent and delicate works’ (probably scaling). From ...