Plant story-- Holly, holy and Hollywood, a Holly Postscript

In researching English (or European) holly Ilex aquifolium (holly family, Aquifoliaceae) I generated questions and here are the answers to two that puzzled me:
1) Is the word holly derived from holy?
and
2) Is Hollywood, California named for a grove of European holly trees?

Plant Story -- European Holly - Not Always with Spines and Red Berries

European holly, Ilex aquifolium

European holly, Ilex aquifolium is widely recognized by its spiny leaves and red berries (drupes) (see post on holly folklore). Curiously, not all the leaves on European holly are spiny and not all the plants have fruit.

First, holly trees vary in the number of spiny leaves. You can see it in any of the photos--some leaves are smooth and others have spines on the edge.

All sorts of people have thought about the variation in the spines. Young plants tend to have mostly spiny leaves. (photo below) On a big tree, the lower branches have more spiny leaves than higher branches.

Plant Story -- Holly (Ilex aquifolium) Celebrating the Solstice--and Christmas--for Millennia

European holly, Ilex aquifolium

We sing "Deck the halls with boughs of holly" at Christmastime, often without thinking about what we are saying. 

I live in an area where the traditional holly cannot grow, and yet everyone knows what holly looks like.

Why?