this question makes no sense
no they would keep the males last name and just change the abriviation.
Your sister's husband is your brother-in-law, but in conversation you would not use that term as a title, but would call him by name.
Say her name was Marjorie Jane Foster and her husband's name was Fred Arnold Smith - (Foster was her father's name):-When her husband was alive you would normally address her as Mrs. SmithWhen her husband dies most ladies keep their married name and continue to be known as Mrs. Smith.When you addressed the envelope you would send it to:Mrs. M.J. Smith
You would call your husband's cousin by name or "my husband's cousin." In the English language and culture, the cousin of your spouse is not considered to be related to you.
Morunfolu was the name of the late husband. Sir Kofo Abayomi is the second husband. She might have told him that if he was going to marry her, he would have to change his name from Kofo John to Kofo Abayomi, quite possible.
Refinance
if your husband and his dad are the only one putting their name on it? yes. i would be! especially if you were no longer with your husband and they would get everything. anyway- why is your father-in-law putting his name on it!? unless he is living with you or payed for pretty much all of it, i don't see how it's his business?
"woman like you"?
You would address it. Betty weaver Tully. For example: Mrs. John Tully. John would have been the husband who died.
My husband and I would like to know how JC Penny got it's name>
She would be your niece. You're her aunt by marriage !
Grandfather. Or his name, the same as you would any other inlaws.