What is a “right hand servant”? Does the owner of a “right hand servant” have to be married?

No File Exists
Check below answers in case you are looking for other related questions:
Intercourse with female prisoners of war
The difference between slaves and prostitutes

No File Exists
Related Answers:
He hired a woman to serve him then he agreed with her that she would be his slave
What is the ruling on intimacy with slave women?
Intercourse with a slave woman is not regarded as zina (adultery)
Intercourse with female prisoners of war
The difference between slaves and prostitutes

Recommended answers for you:
Reducing the mahr is the Sunnah
The difference between love and a haraam relationship
Rulings on the mourning of a woman whose husband has died
Neglecting prayer out of laziness
Ruling on a woman putting her picture on Facebook