The name “Santa Susana” traces back to the Roman Empire and the Santa Susanna-church built in the 4th century, dedicated to Saint Susanna, a Roman Catholic saint that was martyred and beheaded in Rome in the 3rd century. The name has since then been applied to numerous locations, including the transverse mountain range of Santa Susana in Southern California, which the town is named after. The Santa Susana Knolls of Simi Valley have historically also been written Susanna with double N’s.
Wikipedia contributors. “Santa Susana, California.” Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, 2 Dec. 2018. Web. 28 Dec. 2018.