their family (singular)

(a)  

your father (familiar)

(a)  

our cousins (masculin)

(a)  

your aunt (familiar)

(a)  

their sister

(a)  

my brother-in-law

(a)  

his sister-in-law

(a)  

her grandmother

(a)  

our grandfather

(a)  

his parents

(a)  

your uncle (formal)

(a)  

his niece

(a)  

their nephew

(a)  

our grandparents

(a)  

her step-brother

(a)  

your cousin (familiar/feminine)

(a)  

your cousin (formal/masculine)

(a)  

my family

(a)  

their brothers

(a)