What relation is your aunt's father-in-law to you?
Your uncle's brother can be your father, your father's
brother/your uncle, your mother's brother/your uncle, an
uncle-in-law maybe if he's married to your aunt. Too many
possibilities to be certain. Your uncle's brother can be your
father, your father's brother/your uncle, your mother's
brother/your uncle, an uncle-in-law maybe if he's married to your
aunt. Too many possibilities to be certain. Your uncle's brother
can be your father, your father's brother/your uncle, your mother's
brother/your uncle, an uncle-in-law maybe if he's married to your
aunt. Too many possibilities to be certain.