Tiro, Caelestrius
an intimate friend of the younger Pliny. They had served together as military tribunes, as quaestors and as praetors, and were in the habit of frequently residing in each other's houses. (Plin. Ep. 7.16.) Four of Pliny's letters are addressed to him (Ep. 1.12, 6.1, 22, 9.5).
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.