“Singh” is the middle or last name given to a man who becomes a Sikh and/or takes Amrit. “Singh” literally translated means “lion.”
“Kaur” is the middle or last name given to a woman who becomes a Sikh and/or takes Amrit. “Kaur” literally translated means “princess.”
~ “Sikh Dharma International Glossary” (https://www.sikhdharma.org/glossary/).