You are an Arab right? You should know better.
http://www.almaany.com/ar/dict/ar-ar/مهدي/
http://www.almaany.com/ar/dict/ar-ar/مهدي/
mahdy (with a fatha) (#1 on the list) means the guided one or the gift receiver (its maf3ool)
Mohdy (with a damma) (#2 on the list) means the one who guides or the gift giver. (its fa3el) This is like Hadi which is also fa3el.
His name is mehdi/mahdi not Mohdy. You were saying mahdi is the gift provider but thats mohdy.
The Imam el Mahdi is the guided imam or the gifted imam not the guide providing or gift providing one.
