 Rajkumari Amrit Kaur was his aunt and his elder brother was Air Vice-Marshal Kunwar Jaswant Singh, PVSM (1915–1963).In 1940, Singh was commissioned as a Second Lieutenant in the British Indian Army and was posted to the south of Iraq.Upon his return to India he purchased a farm in the remote district of Lakhimpur Kheri and built himself a home – named in honour of his father – Jasbir Nagar.