Dr Daniel McClellan, an honorary fellow at the University of Birmingham has finally revealed the back story of Jesus' supposed 'middle name'.

In a TikTok video, Dr McClellan explains that contrary to popular belief, the 'H' doesn't stand for anything at all.

Instead, this letter has its origin in an ancient Greek symbol called a 'Christogram'.

According to the expert, the nickname emerged from a long-forgotten joke about Jesus' initials.

Dr McClellan says: 'The most widely accepted theory is that it derives from a specific Christogram.

'A Christogram is a one, two, or three letter abbreviation that is used as a symbol to represent the name Jesus, the titled Christ, or the name Jesus Christ.'

However, over hundreds of years, one of these symbols became warped through translation to leave the supposed initials JHC.

In the early history of the church, Christians started to create symbols which abbreviated Jesus' name.

For example, one you might use without even knowing it is the abbreviation of Christmas to 'X-mas'.

Dr McClellan says: 'The X represents the Greek letter 'Χ' or 'Chi' which is the first letter in the title Christ: Χρ?στος (Christos).'

Likewise, in the Roman Catholic faith, you might see a symbol which looks like an 'X' with a tall 'P' emerging from it.

This symbol is a combination of the ancient Greek letters 'Chi' and 'Rho', which give the first two letters of 'Christ' in Greek.

According to Christian beliefs, this was the very symbol which the emperor Constantine saw in a vision before converting the Roman Empire to Christianity.

While the story of Constantine's sudden conversion has been made more dramatic over time, the so-called 'Chi-Rho' Christogram soon became his personal symbol.

The Chi-Rho has since been found everywhere from coins and Roman milestones in Britain to a 1300-year-old tattoo in Sudan.