There seems to be some confusion about Jannetje's maiden name. The literature is not consistent as to whether her father was named Voorzanger or Boas or Davids or Leib. I have not studied it carefully enough to determine who are her correct parents.
Perhaps someone who is more closely related to her can help us sort it out.
Jannetje Eleazar Davids - born 1758, died 1832, 73 or 74 years. Daughter of Eleazar Davids and Marianna Matje Boas
married 1781 to:
Abraham Boas - born 1726, died 1792, 65 or 66 years, 1st marriage to: Gittele Levy Marcus, 2nd marriage to: Jannetje Eleazar Davids. Son of Boas Levy (Postelijn) and Johannah Hindele Abraham Polack