Gavlan (Persian: گولان; Syriac: Gāwīlan)[1][a] is a village in Anzal-e Jonubi Rural District, Anzal District, Urmia County, West Azerbaijan Province, Iran.

[5] Gāwīlan (today called Gavlan) may be the diocese of Giennum mentioned in a letter of the patriarch Abdisho IV Maron in 1562.

[6] The Church of Mar Yoḥannan at Gāwīlan has been tentatively identified with the monastery of Mar Yoḥannan at which Shimun IX Dinkha was elected as patriarch in 1580 and wrote a profession of faith in 1585.

[8] The American missionary Justin Perkins met Yoḥannan at Gāwīlan in October 1834.

[11] The bishop Yoḥannan of Anzel fled to England in 1882 following an attack on Gāwīlan by Kurds.