Ilona was born on March 10th, 1888 in Tata. Ilona's father was Imre Ujváry and her mother was Aloyzia Gabriella Burchner. Her paternal grandparents were Mátyás Ujváry and Irma Kováts. She had a brother and two sisters, named Lajos, Irén and Ida. She was the second youngest of the four children. She had a half-brother and three half-sisters, named István, Juliska, Mária and Jolán. She died at the age of 74 in 1962.