Silvanus was the son of Lucius Fundanius Lamia Aelianus and wife Rupilia. According to the Augustan History, Silvanus married Aurelia Fadilla (died 135), daughter of Antoninus Pius and Faustina the Elder.
The Augustan History claims that Fabia Orestilla, the wife of Gordian I, was a descendant of the Emperor Antoninus Pius through her father Fulvus Antoninus, a descendant of Silvanus. Modern historians have dismissed this name and her information as false, as they believe his wife was the granddaughter of the Greek Sophist, consul, and tutor Herodes Atticus.
- Werner Eck, "Die Fasti consulares der Regierungszeit des Antoninus Pius, eine Bestandsaufnahme seit Géza Alföldys Konsulat und Senatorenstand" in Studia epigraphica in memoriam Géza Alföldy, hg. W. Eck, B. Feher, and P. Kovács (Bonn, 2013), p. 74
- Historia Augusta, Antoninus Pius 1.7; translated by Anthony Birley, Lives of the Later Caesars (Harmondsworth: Penguin, 1976), p. 96
- Historia Augusta, The Three Gordians, 17.4