How to use "cousin" in a sentence

'Jack Favell is Rebecca's cousin,' Beatrice said

'She had a cousin, an awful man, called Jack Favell

'This is Jack Favell, my late wife's cousin

I knew my cousin was brave enough for any emergency, but he was not the sort of man to understand danger quickly and do something about it

And there, amazed and afraid, as I too stood amazed and afraid, were my cousin and my wife - my wife white and tearless