- Fidel,
Fidel, de Sigmaringa, Santo, 1577-1622 (Autor Personal)
- Fidelis Roy, von Sigmaringen, Saint, 1577-1622
- Cabecera anterior: Fidelis von Sigmaringen, Saint, 1577-1622
- Fidelis, von Sigmaringen, Saint, 1577-1622
- Rey, Mark, 1577-1622
- Roy, Mark, 1577-1622
- Roy, Markus, 1577-1622
- Sigmaringen, Fidelis of, Saint, 1577-1622
His Das Tugendbüchlein des heiligen Fidelis, c1986: p. 9, etc. (Fidelis von Sigmaringen) p. 11-12 (b. 1577 as Markus Roy; lawyer; became later priest and Capuchin with name of Fidelis; martyred 4/24/1622; canonized in 1746)
LC data base, 6-18-87 (hdg.: Fidelis von Sigmaringen, Saint, 1577-1622; usage: Fidelis von Sigmaringen)
Holweck's biog. dict. of saints, 1924 (Fidelis of Sigmaringen (Mark Roy); b. 1577; d. 1622; lists several others with same name)
Book of saints, 1966 (Fidelis of Sigmaringen (St), M., OFM Cap, 1577-1622; Mark Rey)
Lex. d. dt. Heiligen, 1959 (Fidelis Roy von Sigmaringen, (TN Markus), hl. Priester OCap; b. 1577; d. 4/24/1622)
Brock. Enzy., 1968 (Fidelis, Kolostername f. Markus Roy; b. Sept./Oct. 1578 in Sigmaringen; d. 4/24/1622)
Compendio de la vida y virtudes del abogado de los pobres San Fidel de Sigmaringa, Capuchino proto-martir de la sagrada Congregación de Propaganda Fide. Exemplo de abogados, y dechado de jurisconsultos, 1786: portada (San Fidel de Sigmaringa)
Ency. Brit., 15th ed.