I am also searching for elusive Kordes'. Mine are from Milwalkee Wisconson via Chicago. Originated in Alsace Germany. Imigrated a little after 1900. According to my Grandfather they were coal miners, although, they still operate a funeral parlor in Milwalkee. There were 5 brothers and a couple of daughters in the family Im chasing. My GF changed his spelling by changing the K to C. The rest still used Kordes.
Drop a line and we'll see if there are Matches.