Indo-European
The family that got our favored discipline started.
Anthologica Universe Atlas / Reference / Natlangs / Indo-European

Subfamilies

Albanian
Anatolian
Armenian
Balto-Slavic Prussian (old-style), Lithuanian, Latvian, and the mutually unintelligible yet somehow at the same time intelligible Slavic languages.
Celtic Gaulish, Celtiberian, Lepontic, Brythonic, and Goidelic.
Germanic Axes, beer, and plunder. And eventually having two or three world-spanning empires.
Graeco-Phrygian
Indo-Iranian
Italic Latino-Faliscan, Osco-Umbrian, and their descendants.
Tocharian