Hello Lazslo, I am also looking for more details about this family. My great-great grandmothers name was Franziska Petheö von Gyöngyös, her maiden name was Czollner von Massenberg. I would like to know more about my family, but all I know is this: she was married to Franz Petheö de Gyöngyos and died on Novemer 23rd 1896. Her granddaughter Ilona was my grandmother. I also know that she had several children who all lived in Budapest. Do you have any more details? I would be pleased to hear from you again.