Colette, I don't have any suggestions for general or Ohio genealogy guides but the census is always a good bet for a starting place. I just took a look at the 1920 Ohio census and saw an entry for an Audward? LaRocque age 19, born Ohio living with his widowed mother, Anna E. LaRocque age 39 and his widowed maternal grandmother (age unknown) Mary Ford. The family was in Toledo, Lucas County and recorded on ED 132 Sheet 25A (Ward 12). The family also shows up in the 1900 census in Lucas County, ED 103, Page3A. This might be your grandfathers family. It's worth checking. Good Luck, Pete Schueler