Conversation so far:
Where was Rudolf Steiner born?
Rudolf Steiner was born in Murakirály in the Muraköz region of the Kingdom of Hungary, Austrian Empire.
Where did Rudolf Steiner grow up?
In the first two years of Rudolf Steiner's life, the family moved twice, first to Mödling, near Vienna, and then to Pottschach, of the eastern Austrian Alps in Lower Austria.
Who were Rudolf Steiner's parents?
Rudolf Steiner's father was Johan Steiner and his mother was Franziska Blie.

Question: did he have any siblings?
Self-contained rewrite: Did Rudolf Steiner have any siblings?