I find new three infants baptism: R.K. / R.C. (Roman Catholic)
Anna Elizabeth Koopman, 03-05-1801 at Amsterdam, get. Fredericus Wamelink and Joanna Faanik. Anna Elizabeth Koopman married on 07-05-1834 te Amsterdam with Theodorus Barensma, baptism on 09-06-1775 te Deventer.
Catharina Koopman, baptism on 07-12-1802 at Amsterdam, get. Ernestus Frederik and Catharina Walboria. Catharina Koopman married on 30-07-1834 te Amsterdam with Jan de Ridder, born 13-03-1803 and baptism on 18-03-1803 te Amsterdam.
Joannes Koopman, baptism on 21-12-1807 at Amsterdam, get. Matheus Crogte and Elizabeth Dons.
The parents are, from the three child's: Joannes (Jan) Koopman and Martha Brunselaar.
Sorry, i have no answer, about the parents from Joannes (Jan) Koopman.