Former means the past
If your former friend is mean to you and told your former best friend, who needs her around, then no, that friend doesn't miss you. That friend clearly is mean and doesn't want to be friends anymore.
Do you mean Mesopotamia? It's the former name of Iraq.
From the former.
If you mean the most successful from Destiny's Child, then Beyonce.
Your former friend said this in a mean way so that you would understand not to sit with her.
Probably you mean "X Japan" which is a former rock group.
"Former aide freed" likely means that a former employee or assistant who was previously incarcerated or detained has been released or set free from custody.
Erstwhile means former, previous, or in the past.
The name that u were originally born with.
This means the people who were president but are no longer.
"Ex-principal" = former principal, or former head administrator of a school, typically K-12.
Words that mean the same or similar to the word former: prior, ex, previous, preceding, past.