Historians believe Pochahantas had a sister or half-sister named Matachanna. But we don't know much about her. But we think she may have known English as well as her sister or half-sister.
Pocahontas
Probably not, considering that when he knew her she was about 12 and he was nearly 30.
Your sister's sister is your sister.
Yes, the sister of your spouse (wife or husband) is your sister-in-law. In addition, the wife of your brother is also your sister-in-law.
Sister My Sister was created in 1995.
If your sister in law is your wife's sister then she would be nothing to your sister. However if your sister in law is your brother's wife then she would also be your sister's sister in law.
There are two ways you can have a sister-in-law. In one case, her sister is also your sister-in-law and in the other she is not. Your sister-in-law can be the sister of your spouse. Then your sister-in-law's sister is either your wife or is also your sister-in-law. Your sister-in-law can also be the wife of your brother. In that case, your sister-in-law's sister is not related to you.
Real sister, half sister, or step sister
The duration of Sister My Sister is 1.48 hours.
Sister
Type in "Sister Sister" into Wikipedia.
Your sister and your wife's sister are not related to each other.