Possibly Leonhardt Passavant?
Born ?. Died 1785 in Trankebar (Rasch, VGK 7, 109)
1762-11-23 - Listed in the DAC Roll Books as Oberassistent onboard the DAC ship KONGEN AF DANNEMARK headed for Canton. (DAC Roll Books - RA)
1785 - Possibly the same Passavant, who was bogholder in Trankebar and died suddenly in 1785 (Rasch, VGK 7, 109)
The name is Swiss - a family of that name arrived in Basel in the 16th century. (Historisches Lexikon der Schweiz)