Tjorven is a Swedish nickname. You could translate it with "flibbertigibbet". It was used by the Swedish childrens' books author
Astrid Lindgren in her book "
Vi på Saltkråkan". It was the nickname of the little girl
Karin Maria Eleonora Josefina Grankvist. The slang word "tjorva" means something like "get messy", so Tjorven really isn't a "real" name actually.
In Sweden there are a lot of dogs bearing that name. And in Swedish postal slang a "Tjorven" is a car used by postmen.
Regards,
Satu