Tengku Aishah was born on 19 June 1952 in Batu Gajah, Perak to Tengku Seri Utama Raja Tengku Besar Mahmud ibni Almarhum Sultan Zainal Abidin III and his second wife, To' Puan Hajah Zainun Meriam binti Haji Su Mahmud.[2] She is of Terengganu royal lineage.
On 16 February 1973, the royal engagement between Tunku Besar of Seri Menanti Tunku Muhriz, then aged 25 years and Terengganuprincess Tengku Aishah Rohani, then aged 21 years and 7 months old (she was only four months short of her 22nd birthday) took place at Istana Terengganu, Jalan Pekeliling.
Prior to their engagement and courtship, Tunku Muhriz was employed as an administrative officer at Bank Rakyat whilst his future wife Tengku Aishah Rohani was working as a clerk at local bank in Malaysia.
Royal marriage
On 25 April 1974 (corresponding to the Islamic calendar date of 2 Rabiul Akhir 1394 Hijri), she tied the knot to a Negeri Sembilanprince, Tunku Besar of Seri Menanti Tunku Muhriz when she was 22 years and 10 months old (two months short of her 23rd birthday). Their royal wedding reception was held at Istana Maziah, Kuala Terengganu witnessed by Tunku Muhriz's mother, Tunku Ampuan Durah alongside with other members of the Negeri Sembilan and Terengganu royal families.
On 4 May 1974, Tunku Ampuan Durah held a royal couples departure ceremony (istiadat keberangkatan balik pengantin diraja) at Istana Lama Seri Menanti. Their royal highnesses conjoined on the wedding dais also in Istana Lama Seri Menanti.
Tuanku Aishah was installed the 11th Tunku Ampuan Besar of Negeri Sembilan on 14 April 2009[2] in Seri Menanti royal palace. The ceremony was steeped in tradition and followed old Negeri Sembilan royal customs where the installation of the queen preceded the installation of the Yang di-Pertuan Besar of Negeri Sembilan.