Awww, that’s so cute! Which island do you live on? If you don’t mind sharing. 

(I admit it’s pretty cool living in New York, a place that’s often mentioned in VC. We even have St. Patrick’s Cathedral. Memnoch the Devil locations.)

(AND I AM GOING TO NEW ORLEANS THIS THURSDAY awww yisss. Such bragging.)

AS FOR YOUR QUESTION: Someone else may have the answer, but if I recall correctly, I don’t think the island is ever mentioned by name because Marius doesn’t want Lestat trying to follow him after being expelled for Doing The Thing. I did a quick scour of TVL and B&G and didn’t find anything more specific than this: 

“And then as the 1700s commenced, I prepared to make a daring move to an island where I would rule supreme in the Aegean Sea, surrounded by mortals who would easily accept me as their lord, in a stone house which I had prepared for me by a host of mortal servants.”

“…I was on the terrace of this new house, gazing out at the sea and over the many small islands that surrounded me,” – Marius de Romanus, Blood and Gold

So it’s in the Aegean Sea, and it’s an island surrounded by many small islands.

Alonnisos seems to fit that description, although it isn’t SURROUNDED. It’s one of the few that has a bunch of islands around it in more than one direction. IDK what his definition of “small” is for an island, they all look pretty small to me. 

There’s also Siros, which is also surrounded by a number of small islands and is, itself, in the Aegean Sea.

Hope that helped!