Rényi Krisztina is a Hungarian illustrator. She is extraordinary. I love her use of colours and Golden Age evoking technique. She is among the best children illustrators I have came accross in Hungary.
I bought most of her works, that I could get my hands on through old and online bookshops. Her website is brim on information related to her work: http://www.krisztinarenyi.hu/index.html and a veritable source of information on this talented woman.