A first cousin is any daughter or son of your aunt or uncle. We also have second, third, etc. cousins who are, collectively with first cousins called cousins. A second cousin would be, for example, your first cousin's child. ya cousin can be used for both males > females.
Considering this, who are my cousins?
Children of your cousin are actually called your “first cousins once removed.” Your cousin's child is NOT your second cousin as is commonly believed. The appropriate name for addressing your cousin's child is niece or nephew, even though they are actually first cousins once removed.
Where did the word cousins come from?
mid-12c., from Old French cosin (12c., Modern French cousin) "nephew, kinsman, cousin," from Latin consobrinus "cousin," originally "mother's sister's son," from com- "together" (see com-) + sobrinus (earlier *sosrinos) "cousin on mother's side," from soror (genitive sororis) "sister."
What do you mean by cousin brother?
cousin brother. New Word Suggestion. Cousin is used for both brother and sister. Hence, it leads to confusion unless specified, and it needs an extra word/words. To avoid this, cousin brother (likewise, cousin sister) can be used.