Yahya Petra
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 Yahya Petra in 1960 | |||||||||
| Yang di-Pertuan Agong VI | |||||||||
| Reign | 21 September 1975 – 29 March 1979 | ||||||||
| Installation | 28 February 1976 | ||||||||
| Predecessor | Abdul Halim | ||||||||
| Successor | Ahmad Shah | ||||||||
| Sultan of Kelantan | |||||||||
| Reign | 10 July 1960 – 29 March 1979 | ||||||||
| Coronation | 17 July 1961 | ||||||||
| Predecessor | Ibrahim | ||||||||
| Successor | Ismail Petra | ||||||||
| Born | 10 December 1917 Istana Balai Besar, Kota Bharu, Kelantan, Unfederated Malay States | ||||||||
| Died | 29 March 1979 (aged 61) Istana Negara, Kuala Lumpur, Malaysia | ||||||||
| Burial | 30 March 1979 Langgar Royal Mausoleum, Kota Bharu, Kelantan, Malaysia | ||||||||
| Spouse | |||||||||
| Issue | Tengku Merjan Tengku Rozan Tengku Salwani Tengku Rohani Tengku Ismail Petra Tengku Mohamad Petra | ||||||||
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| House | Long Yunus | ||||||||
| Father | Sultan Ibrahim Ibni Almarhum Sultan Muhammad IV | ||||||||
| Mother | Che Puan Besar Embong Binti Daud | ||||||||
| Religion | Sunni Islam | ||||||||
Sultan Yahya Petra ibni Almarhum Sultan Ibrahim GCMG (Jawi: سلطان يحيى ڤيترا ابن المرحوم سلطان إبراهيم; 10 December 1917 – 29 March 1979) was Sultan of Kelantan from 1960, and the sixth Yang di-Pertuan Agong, the constitutional monarch of Malaysia, from 1975, until his death in 1979.