Yep. The PIE family. From the Wikipedia article "Trifunctional hypothesis":
"According to Dumézil (1898–1986), Proto-Indo-European society comprised three main groups corresponding to three distinct functions:
, which fell into two distinct and complementary sub-parts -- one formal, juridical and priestly but worldly; the other powerful, unpredictable, and also priestly but rooted in the supernatural world.
, connected with force, the military and war.
"3. Productivity, herding, farming and crafts
; ruled by the other two.
"In the Proto-Indo-European mythology each social group had its own god or family of gods to represent it and the function of the god or gods matched the function of the group. Many such divisions occur in the history of Indo-European societies."
Unquote. Read: (1) unicorns, (2) pegasi, (3) earth ponies.
Cf. the three main caste divisions in India: Brahmins, Kshatriya, and Vaishya.