From Lewis Carroll’s A Tangled Tale: The governor of Kgovjni gives a dinner party for his father’s brother-in-law, his brother’s father-in-law, his father-in-law’s brother, and his brother-in-law’s father — and invites a single person:

Males are denoted by capitals, females by small letters. The governor is E, and his guest is C.

See “Proof That a Man Can Be His Own Grandfather,” No Reunion, and The Half-Bastard.