Researching for Polish people dealing with Indians during 19th century, I've found out about Estanislao, one of Yokuts' leaders, who led different groups of Californian Indian rebels against Mexican Government.
Name Estanislao is Spanish version of Stanislaus, chosen after St. Stanislaus, 11th century Bishop of Kraków, who was killed by Polish king Boleslaw II (the reasons for what were connected with Investiture Conflict).
The name was chosen by a missionary at San José, who baptised Estanislao when he was around 28 years old. Many sources confirm that choice, but not of them that I was able to find, speak of why this particular saint was chosen as his patron.
Is anybody interested in Californian Indian history and could put more light on that topic? What was the usual reason for choosing the patron for a person at Mexican missions?