All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
We have already issued Fatwa 88517 clarifying that it is permissible to name a new-born after one of the Names of Allaah provided that this name has a meaning which is common between Allaah and humans and provided that this name is not definite [i.e. not with the definite article –‘Al (the)]; so please refer to the above Fatwa.
What we mentioned in the Fatwa applies to the name “Haadi” without the definite article –al– therefore, it is not an obligation to change this name.
For more benefit, please refer to Fatwa 87307.
Allaah Knows best.