Leen is a name of multiple origins. It is a popular Arabic name for girls meaning “tender” and “delicate”. It is spelled لِينٌ in Arabic and has been translated into English in multiple spellings. It can also be a unisex given name of Dutch origin.

As a name for girls, it can be a Dutch short form of the name Heleene. As a masculine name, it can be a Dutch short form of Leendert.

Wikipedia