I asked about this before, but two developments happened this year.
1.) It produced a few white/yellow/orange berries for the first time.
2.) My Mom said she thought it was Oregon Holly.

a.) What type of Holly is this?
b.) Is it Oregon Hollly?
c.) How do I get it to produce more berries? Why is it only making a few? Why did it never make any before?
d.) Is it considered invasive in my area?
e.) What kind of Holly could I get it as a pollinator?

If this is English Holly, why doesn't the Blue Prince hybrid holly I have a hundred feet away or so away pollinate it? I planted the male holly a year ago and got no berries, this year I only got as few.

What can I plant to pollinate it?

This is definitely an Ilex, most likely Ilex aquifolium or as Dorie indicates, a variegated English holly. It most likely did not produce berries previously because there was nothing available to pollinate it. Holly cross-pollination is complicated - flowering times must be concurrent as well as using compatible species. The Blue Prince could cross-pollinate as one of its parents is I. aquifolium. American holly (Ilex opaca) could also serve to pollinate. The male plants do not need to be extremely close by (within ~400' or so) but the bloom periods must coincide. Berries may or may not be present or produced in much quantity otherwise.

You would have much better success if you obtained a distinctly male cultivar of English holly, like 'Silver Queen' (yes, its a male, despite the name :-)). 'Gold Coast' is another male cultivar.

I haven't seen a lot insects on either. However,there is a neighbor down the street who I hear has bees.

I've never seen a single flower on the original mystery holly.

I suspect this probably is a bloom timing issue...which is why I'm asking. Can anyone figure out what kind of Holly I should plant? I have a finite amount of space I can devote to male Holly trees. Does Blue Prince pollinate English Holly? If so, it would tell me that this *ISN'T* English Holly.

The holly tree is big, has white edges to it's leaves, and yellow orange berries. Also not happy in Zone 6. Does that give anyone a clue to what I have, and what I should plant?

What kinds of holly have orange berries and white edges to the leaves?

Males and females of the same species can be expected to bloom simultaneously, which is not necessarily the case for two different species or for a species/hybrid combo.

Blue Prince can cross pollinate English holly but there is no guarantee you will have (or consistantly have) simultaneous bloom periods.

If you want a guarantee of berries, purchase from one of the suppliers that grows both male and female plants together (ie. Monrovia's China Boy & China Girl) or a self-fruiting type like Nellie R. Stevens.

"I've never seen a single flower on the original mystery holly. "

As I said EARLY on, this is a variegated English Holly...there are several different cultivars. American Holly can also perform as a pollinator for English hollies, so that should increase your choices. Simply look up male American and English Holly cultivars. That's Ilex aquafolium and Ilex opaca, respectively.