The difference is that a person's father's brothers and sisters' sons are called cousins; The sons of brothers and sisters of a man's mother are called cousins.

For example, if you have an aunt, her son and you are cousins, usually called cousins for short. And your mother has sisters, that is, your aunts, whose children are cousins with you. That is, cousins, it is precisely in the title that "aunt" cannot be omitted to distinguish cousins.

Extended data:

Introduction to common appellations:

Women and men are called parents.

Say "mom and dad" and "mom and dad". Written language or outsiders call it "parents", "parents", "mother father" and "mother father".

Women and men are called mothers.

Say "Mom", "Niang" and "Mammy". Written language or outsiders call it "mother", "my mother", "grandmother", "old lady" and "grandmother".

Women and men call their fathers.

Say "daddy", "daddy" and "big". Written language or outsiders call it "father", "my father", "grandfather", "old man" and "old man".

Grandson's name is _ mom.

Say grandma, grandma, grandma, grandma _ grandma, grandma. Written language or outsiders call it "_ mother", "grandmother", "big mother" and "queen mother".

Grandson is called grandma.

Say "grandma", "nanny", "grandma" and "nanny". Written language or outsiders call it "grandma", "grandma", "big mother" and "queen mother"

Grandson's name is _ Dad.

Say "grandpa", "grandpa", "grandpa", "grandfather" and "grandfather". Written language or outsiders call it "_ father", "grandfather", "emperor's father" and "king's father"

Grandson calls him grandpa.

Say grandma, grandma, grandpa, grandpa, grandpa, grandma. Written language or outsiders call it "grandpa", "grandma", "big dad" and "father Wang"

Nephew's name is aunt.

Oral "menstruation", "menstruation", "mothers", "mothers" and so on. Written language or outsiders call it "aunt" and "slave mother"

Nephew's name is aunt.

Say "auntie", "girl", "auntie" and so on. Written language or outsiders call it "aunt".

The nephew is called uncle.

Say "Uncle Dad", "Uncle Dad" and "Aunt". Written language or outsiders call it "uncle"

The nephew is called uncle.

Say "uncle dad", "uncle dad", "uncle dad", "uncle dad" and so on. Written language or outsiders call it "uncle", "father" and "slave father".

The nephew is called uncle.

Say "Uncle Dad", "Uncle Dad", "Several dads" and "Several dads". Written language or outsiders call it "uncle" and "subordinate father"

Baidu encyclopedia-family appellation