Who Is Who?

Riddle: If May's daughter's daughter is my granddaughter's mother's mother's brother's sister, then what am I to May? (May only has one sibling)

Answer: I am May.

Source: https://www.riddles.com/2555

If May's daughter's daughter is my granddaughter's mother's mother's brother's sister, then what am I to May? (May only has one sibling) — Who is who? by NEO JIA QI v1.

Riddle: If May's daughter's daughter is my granddaughter's mother's mother's brother's sister, then what am I to May? (May only has one sibling) Answer: I am May. — by NEO JIA QI v2.