Piyapas is a great-granddaughter of Prince Nares Varariddhi, who was a son of King Mongkut.
This distant royal descent is reflected by her title Mom Luang.
Her father, M.
R.
Yongsawat Kridakorn, was a deputy director of the Crown Property Bureau.
Her mother, Wiyada Kridakorn Na Ayudhya, was a lady-in-waiting to Queen Sirikit.
Her nickname is "Khun Ton" (??????).Piyapas went to Chulalongkorn University demonstration school and Chitralada School (the school attended by children of the Thai royal family).
She completed a bachelor's degree in history from the Faculty of Education, Chulalongkorn University.
She married Chutinant Bhirombhakdi, one of the heirs to the Boon Rawd Brewery fortune and executive vice-president of the Singha Corporation.
They have two daughters and a son.
Their eldest daughter is Chitpas Kridakorn, politician of the Democrat Party who has been a member of the Thai House of Representatives since 2019.