Son Sann
Thou Thon's brother Colonel Thou Thip had co-founded the KPNLF in Paris in 1978, together with Son Sann and Dien Del among others. Thou Thon also had a brother and a sister in New Zealand but he refused to accept their sponsorship offers. Unlike Thou Thip, Thou Thon maintained at best only a lukewarm relationship with Son Sann.