The belief in this type of guardian spirits remained strong in Scandinavian folklore up until the last centuries and continues to be found in northern faith based religions today.
The respect for the tree was so great that the family housing it could adopt a surname related to it, such as Linnæus, Lindelius and Almén.
It was often believed that the wights (Swedish vättar) of the yard lived under the roots of the warden tree, and to them, one sacrificed treats to be freed from disease or bad luck.
The Guardian trees were said to have been taken from sacred groves as saplings by pre Christian Germanic peoples, though today can be planted from anywhere.
[1] This article contains content from the Owl Edition of Nordisk familjebok, a Swedish encyclopedia published between 1904 and 1926, now in the public domain.