It began as a recurring sketch on Alan’s Big 1FM, and was written by its star Michael Redmond.
It later reappeared with more instalments on Shuttleworth’s Showtime. But come late October 1996, Eamon, Older Brother Of Jesus, was due to become its own 15 minute show on BBC Radio 4.
It never aired.
The premise of the show was that the Holy Family was Irish and had left for Israel, where Mary gave birth to two sons, Jesus and Eamon. The latter is constantly overshadowed by his younger brother and bitterly complains to his father Joseph … [I]t quickly raised the ire of the British Sunday Times … [which] was able to persuade the BBC to drop the series.Incorrect Entertainment by Anthony Slide
Michael talks about this on this podcast.