From beyond the grave, father-of-four Patrick Carroll continued a five-decade crusade to steer his children away from being active Jehovah's Witnesses and into Catholicism.

Mr Carroll wrote into his will that his adult children were not to receive any inheritance unless they met two conditions: attend his funeral and become Catholics within three months of his death.

Thine is the kingdom: a father would not share his inheritance with his children unless they converted to Catholicism. Credit:Aaron Sawall

Mr Carroll died in April 2012. His children attended the funeral but they did not become Catholics and challenged the condition in the NSW Supreme Court in a bid to still receive their share of his estate.

But Justice Francois Kunc last week ruled that Mr Carroll was entitled to place such conditions on his will.