Druids, this was the dominant religion in "Britannia" (Britain) at the time of the Roman invasion (60AD)
The Druids
Mistletoe is a plant belonging to the order Santalales.There are over 900 species of mistletoe but the mistletoe that is commonly sold for Christmas is the species Phoradendron flavescens.
Viscum album (European mistletoe) and Phoradendron leucarpum (American mistletoe) are used for medicinal purposes.
Kahana is a European Jewish name, that is related to the Hebrew name Cohen, which is the term for ancient Jewish priests.
mistletoe bird
mistletoe, holly
It is unknown why the plant is called mistletoe. It is accepted as the common name of a parasitic evergreen species.
viscum album
mistletoe, holly
Mistletoe is the common name for most obligate hemiparasitic plants in the order Santalales
In the Biblical Age, Ancient Israel had Priests called Kohanim (literally Hebrew for "Priests") who oversaw the sacrifices in the Great Temple and passed this position to their children. The Kohanim still exist today as the descendants of those Priests and commonly have the last name of Cohen or some variant to indicate their ancestry.
The fruits (drupes) don't have a name.