Sibylle von Olfers (8 May 1881 – 29 January 1916) was a German art teacher and a nun who worked as an author and illustrator of children's books. In 1906 she published her most well-known work, The Root Children (original title: Etwas von den Wurzelkindern, "Something about the children from the roots").
Sibylle von Olfers was born as Maria Regina Angela Hedwig Sibylla von Olfers in the Castle of Metgethen (Schloss Metgethen) on 8 May 1881. The castle was the mansion of Metgethen estate, near Königsberg. At that time the estate lay within the administration district of Samland, but was incorporated by Königsberg in 1939. She was the third oldest of the five children of Ernst Friedrich Franz Gustav Werner Marie von Olfers and his second wife Olga Maria Bertha Freiin Behr. Her father was a Health Counsellor, natural scientist and writer. His first marriage was with the older sister of Sibylle's mother with whom he had had four children. Her paternal aunt Marie von Olfers was a major artistic influence.
Sibylle grew up in a sheltered childhood and enjoyed, together with her brothers and sisters, education and teaching through governesses and private tutors. The parents as well had a cordial relationship with their numerous children. Sibylle was considered a delicate, intelligent girl who revealed her passion for arts very early. According to the notes of her grandmother, she had the soft face of a Madonna but was called a wild bumblebee because she differed so much from other kids with her fantastic games and ideas. Sibylle was referred to as talented and prettier than ever. The grandmother wrote furthermore that in her early years she didn't learn very well because she preferred to amuse herself with fantasies of games during the lessons.
Sibylle von Olfers had a very intimate relationship with her little sister who was born a few years after her. Because of her original ideas and her artistic talent, Sibylle created a very happy and fulfilled life for her sister. The picture-books, which she had written solely for her sister, brought a lot of cheerfulness into the life of the whole family.
During her childhood, she sometimes showed a silent, childish religiousness. This could especially be seen when she prayed in front of self-erected altars surrounded by numerous candles or when she modeled Madonnas and drew images of saints per order of her sister.