The word for family, teaghlach [tcheye-lah], refers to the extended family, or the household. There are a number of other terms for family and children.

teachglach	househood, extended family
líon tí	'complements of the house'
muintir	family, relatives
muintir an tí	'occupants of the house
mo mhuintir	my folks
clann	children of the family
mo chlann	my children (not the general sense of my family)
an leanbh	the children
an páiste	the children

 The words for children in general is páisti or leanaí. Parents are tuismitheoiri.

It is not correct to refer to your family as your 'clann'. While this sounds romantic, it means you are referring to the children of your family, not your family as a whole.

seanathair	grandfather	seanmháthair	grandmother
athair	father	máthair	mother
uncail	uncle	aintin	aunt
mac	son	iníon	daughter
deantháir	brother	deirfiúr	sister
nia	nephew	neacht	niece
garmhac	grandson	gariníon	granddaughter

Referring to your husband or wife:

an fear céile	husband	an bean chéile	wife
m'fhear céile	my husband	mo bhean chéile	my wife

One of the stranger things is that there is no single word for 'cousin'. Instead, the relationship is expressed by the degree of relationship.

col ceathar	first cousin, lit. four people related
col seisir	second cousin, lit. six people