Sandy Schwanekamp is name-checked on the cover of "Freak Out!" (1966) under the heading "These People Have Contributed Materially In Many Ways To Make Our Music What It Is. Please Do Not Hold It Against Them".
According to Jo Jetson, on Moon Unit's Facebookpage: "I knew your dad when he I were at Antelope Valley School in Lancaster. I was best friends with Sandy Schwanekamp, his girlfriend at the time, & I was dating Terry Wimberley."