What is the French translation my family?

Well, firstly, it would depend on which family member you wished to talk about.

My sister = Ma soeur, My brother = Mon frère, My mother = Ma mère, My father = Mon père.

You could then go on to describe hair colour, eye colour, etc. or personality.

Ma soeur a les cheveux bruns. My sister has brown hair.

Mon frère est petit. My brother is small.

However, you could talk about your family as a whole.

Ma famille est èstrange. My family is strange/weird.