Guess when I was born... Went to school with James, William, Dan, John, Joseph, David, Elizabeth, Lisa, Margaret, Debbie, Carolyn, Bonnie, Susan, Karen, Michael, and Peter. Most of the Karens I knew were nice people. They don't deserve the bad rap.
Those dude names are common across generations. Debbie and Lisa were popular baby names in the 50s & 60s, Margaret and Carolyn too. I'm guessing you graduated high school around 1975-1980.