What is the meaning of Holly?

Any of various shrubs or (mostly) small trees, of the genus Ilex, either evergreen or deciduous, used as decoration especially at Christmas.

The wood from this tree.

Any of several not closely related plant species likened to Ilex because of their prickly, evergreen foliage and/or round, bright-red berries

Alternative form of holy (sacred)

Alternative form of holy (porous)

holy

Source: wiktionary.org