Location? This name appears in Adams Co. IL,
Cook Co., IL, Wisconsin, Mecklenburg-Schwerin, and Brazil.
Time period also helps. Some of the Waacks in Adams Co., IL are listed at:http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?op=SHOW&...
One of them, William Carl Henry is my great-grandfather.
He did not write well, so his name also appears as WAAK.
His middle name is after his father Carl Heinrich, who also appears as Charles Henry.
Carl / Karl often pass for each other in German names, too.