In the 1787 Census for Copenhagen, my 5th great-grandfather, Ehrenfrid Voigt, is listed as "Comander Sergeant ved P.F.R." Along with him, his wife, and their four oldest children are listed eight other military men as lodgers, six with the notation P.F.R. and two with the notation D.L.R.

Could anyone tell me what the P.F.R. stands for?