From a previous newsgroup post:
"RD 500, at pp. 365-6, carries the line of Sophia van Lodensteyn, wife of
Carel Debevoise (both of New Amsterdam), back to Louis VII and Eleanor of
Aquitaine in 16 generations, through John II, Count of Hainault (paternal grandfather
of the wife of Edward III). The sources shown are NYGBR 66 (1935): 376-83;
Adriaan Willem Eliza Dek, Genealogie der Graven van Holland (1954?), pp. 29-31,
40-41 esp."