fraterculus

From frāter +‎ -culus.

frāterculus m (genitive frāterculī); second declension

1. Diminutive of frāter (“brother; friend”)
   1. A little brother.
   2. A familiar appellation given to a friend.

Second-declension noun.

• “fraterculus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• fraterculus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• fraterculus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.