I have a Rafaela Calvillo in my family that I'm trying to track down. Is Calvillo her maiden name?
If so, this Rafaela was born in 1900 in Union de San Antonio, Jalisco, Mexico. She would have had five siblings; Cecilia born 1891, Jesus born 1893 (my grandfather), Aurora born 1894, Agripina born 1896, Teodoro born 1899, and finally, your grandmother.
I know Union de San Antonio Jalisco doesn't sound like we're related, but when I talk to my mother she always says she is grew up in Leon, Guanajuato. I guess the states of Jalisco and Guanajuato are next to one another.
On the other hand, Calvillo is a very common name in Jalisco, and I guess there's even a town named Rancho del Calvillos.
Hope this helps. Let me know.