The ranks in most Pentecostal organizations is as follows:
member
leader
minister
Elder
District Elder
Suffragan Bishop*
Bishop
Apostle**
Witness
Child
*Suffragan Bishop is not a full Bishop and in some organizations could be considered an assistant or associate Bishop.
**All of the original Apostles are with the Lord. This title usually applies to the Head of the organization, or those who serve on the highest executive board.
Some organizations do not assign the title Apostle to anyone. Accepting those who were called and walked with Jesus, along with Paul, as the only ones rightfully deserving of the title.
The title "witness" and "child" from a spiritual perspective, is actually the highest designations that a believer can have bestowed on them.
Witness denotes first hand experience with any aspect of the true and living God.
Child means you are in the family of God and know it.