Johann Sittinger

was born about 1660 in Großwelzheim, today a part of the town of Karlstein in Lower Fanconia, Bavaria. Johann was the local juryman.
He married Katharina Lämbgen, daughter of Paul Lämbgen.  I do not know how many children the two had together, but I know of two sons:
1) Johann Wilhelm Sittinger * 8 Nov. 1692
2) Georg Paul Sittinger (I am not 100% sure about him, though)
Johann died 25 Dec 1723 in Großwelzheim.

Here are my questions about Johann:
• When was Johann born and who were his parents and ancestors?
• Who were his siblings? One trace could lead to Hörstein...?
• I am also interested on more info about Katharina Lämben, her ancestors and siblings.