Ygnacio Ramón de Jesus del Valle was a Californio ranchero and politician. He owned much of the Santa Clarita Valley and served briefly as Mayor of Los Angeles and as a California State Assemblyman.

Rancho San Francisco was a land grant in present-day northwestern Los Angeles County and eastern Ventura County, California. It was a grant of 48,612 acres (19,673 ha) by Governor Juan B. Alvarado to Antonio del Valle, a Mexican army officer, in recognition for his service to Alta California. It is not related to the city of San Francisco.