Basicly it is your cousins husband or it could be your nephew-in-law
She is your niece.
Son-in-law.
Your step sister's husband is your step brother-in-law.
The sons and daughters of Gaia and Ouranos, namely her brother-husband Okeanos, as well as Hyperion, Krios, Koios and Iapetos and her sisters Rhea, Themis, Phoibe, Theia and Mnemosyne.
What family members your is fathers mothers daughters sons sisters
Medusa and her two sisters were daughters of Phorcys and Ceto.
Your daughters husband is you son-in-law.
She is your niece.
All of the daughters of Zeus are half sisters of Athena.
Husband in-law 2nd Answer: Actually, it's 'Brother-in-law'.
sisters in law
Grand-Nephew