Fleer, menke, schnadenmeyer

Trying to find relatives/ancestors in my FLEER family. Does anyone have any information relating to Johann Heinrick FLEER and Anne Louise MENKE.

I believe they are the parents of Anton Heinrick Otto FLEER, born 1787. Anton Heinrick Otto FLEER married, I believe, Charlotte SCHNADENMEYER, and had at least one son, Carl Ernst August FLEER, born 1832.

Love to hear from anyone who can assist me. Margaret