Joon (جون) , Joonam (جونم) or Janam (جانم) is often used after saying someone's name . It is informal expression that shows your respect to that person. It is not useful for formal meetings or persons you are not really close to.
baba joon (بابا جون), for example, means dear father, or sahar joon, means "dear Sahar". Joonam specifically means my dear.
#joon #babajoon #joonam #janam