Is it permissible to change the name "Tamer" on the birth certificate?

The meaning of the name "Tamer" is "owner of dates" or "one who feeds dates," and naming a child this name is permissible. As for changing a name, its rulings vary: it may be obligatory if the name contradicts the Islamic creed (such as "Abd al-Masih" - servant of the Messiah), recommended if it involves self-praise (such as "Barrah" - pious one) or causes pessimism, permissible if the change is to a similar name, disliked if it is changed to a disliked name, and forbidden if it is changed to a forbidden name or if it results in harm.