In the 1930 US Census for District 15, Armenta, Mora County, New Mexico the family of Tranquilino Fernández was enumerated as follows:
Family #50
Fernandez, Tranquilino; Hed; Owns farm home; M; W; 34; Married at age 25; Can read and write; b. New Mexico; Both parents b. New Mexico; Speaks English; Farmer; Livestock; Non-veteran; Farm Schedule #44
Fernandez, Martha; Wife; F; W; 28; Married at age 19; Can read and write; b. New Mexico; Both parents b. New Mexico; Speaks English; No occupation
Fernandez, Alfredo; Son; M; W; 1-2/12; Single; b. New Mexico; Both parents b. New Mexico; No occupation
[Note: Tranquilino was the brother of Filemón, husband of Zella Barnum].