Career
March Shimun XII Yoalaha like his predecessors Shimun X Eliyah and Shimun XI Eshuyow was not formally recognized by Rome after the hereditary Shimun line of Patriarchs was reintroduced by Patriarch Shimun IX Dinkha in the Chaldean church. His successor in 1662 was Shimun XIII Dinkha the last of the Shimun line in the Chaldean Church.