If your aunt is the sister of one of your parents, then her first cousin is your second cousin, her second cousin in your third cousin, and so forth.
If you aunt is the wife of the brother of one of your parents, then her cousin is not related to you and the English language has no term for that person other than "my aunt's cousin."
Your first cousin's child would be your second cousin
Children of your first cousins, are your first cousins once removed.
The singular form of the plural noun cousins is cousin. The singular possessive form is cousin's.example: I'm going to my cousin's birthday partytoday.
COUSIN : a person related through a maternal or paternal sibling, or their progeny.
The term 'great cousin' is not one used in genealogy. You only have great cousins if you have wonderful cousins!
You and your second cousin's child are second cousins once removed to each other.
first cousin once removed
The English language has no special term for the cousin of a cousin. Either that person is related to you, and so is describable by that direct relationship as some sort of cousin (or a sibling), or is not related to you.
he would be your cousin in law *once removed*. "Once removed" is a term for cousins who are separated by a generation, such as your mom's cousin is to you(and also her husband to you as well). Technically, you all are "first-cousins"(even with the removals), but you and your mom's cousin's children would be second-cousins, just fyi :)
ALL cousins are related "by blood" because the cousin relationship depends on descent from a common ancestor. No one can become a cousin by "marrying in." Some people feel a need for a term to describe the spouse of a cousin, and they sometimes use the term "cousin-in-law", but just as your "brother-in-law" is not your brother, your "cousin-in-law" is not your cousin. Third Cousins are descended from a common great great grandparent.
for female cousins : cousine for male cousins : cousin
That is the correct spelling of the noun "cousin" (a relative through siblings).