Dear Ms. Hamlin,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the Population Schedules for the 1890 Census; the Population Schedules for the 1900 Census, and the Population Schedules for the 1910 Census, the Population Schedules for the 1920 Census, the Population Schedules for the 1930 Census, and the Population Schedules for the 1940 Census in the Records of the Bureau of the Census (Record Group 29) that may contain information about Nicholas Aviles, Paula Mozia Aviles, and Frank Leo Aviles in California. The 1940 Census schedules are digitized and available using the Catalog. For more information about the non-digitized schedules, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at email@example.com.
Due to the continued impact of COVID-19, you may experience a delay in receiving an initial acknowledgment as well as a substantive response to your reference request from RDT1. We apologize for this inconvenience and appreciate your understanding and patience as we balance mission-critical work and the safety of our staff during the pandemic. Please check NARA’s web page about COVID-19 updates for the latest information.
You may wish to search Ancestry or FamilySearch for the U.S. Census. There may be a fee for using Ancestry. Instead, please check for access at your local library as many library systems subscribe to these sites, making them free for their patrons.
We suggest that you contact the California Department of Public Health to request a search for a death certificate for Frank Leo Aviles that may include some information about his parents. You may wish to note any name variants or broaden your search for the surrounding years. In addition, the FamilySearch Research wiki for California Vital Records may be helpful.
We also suggest that you review NARA’s Resources for Genealogists, as well as the History Hub Blog titled Suggestions and Advice for Family History Researchers. The FamilySearch Research wiki for California Genealogy may be useful as well.
We hope this is helpful. Best of luck with your family research!