Your grand daughter's husband is your grandson-in-law.
Your daughters husband is you son-in-law.
Zara Phillips - she is the daughter of Princess Anne and her first husband, Mark Phillips.
Uncle
Mary Lee Cantwell's husband was literary agent Robert Lescher. They had two daughters - Katherine and Margaret.
Grand-Nephew
Son-in-law.
the daughter's cousin
She had her husband, Kind Prasutagus, and two daughters.
London with her husband and twin daughters.
They are your grand-nephews and grand-nieces or great-nephews and great-nieces.
Yes. If your husband's cousin is his first cousin, the cousin's daughters and your children are second cousins to each other. If your husband's cousin is his second cousin, the children are third cousins to each other.