Surely named after Dorothy Dorr Kauffman (1913-?), since one street east we have Kauffman Avenue and beyond that is Annetta Avenue: Annetta Kauffman was Dorothy’s little sister. Our subject was born in Tehama County to Milton Melvin Kauffman (1882-1956) and Lucinda “Rebecca” Kauffman (née Dorr, 1890-1919). After Rebecca’s untimely death, Dorothy grew up with her father and stepmother Gladys in Mid-City Los Angeles and graduated from L.A. High School in 1930. The 1940 census had her living with her father and second stepmother Amelia, and her job was listed as “secretary”. The only additional information I found about Dorothy Kauffman was a sad piece of news from 1961, in which she was arrested in Pasadena on a “drunk charge” and was found living in her car with numerous wine bottles: she said she had been evicted by her landlord in Sierra Madre. She may have died in 1976 but it’s not clear.