No, the noun luxury is a common noun, a word for any luxury of any kind.
A proper noun is the name of a person, place, thing, or a title; for example:
This luxuriously furnished apartment was recently cleaned.
Adverb for luxury is Luxuriously.
The room was luxuriously furnished. After lights out, the camp counselor retired to the counselors lodge and slept luxuriously on a Beautyrest mattress, while his campers dealt with the twigs and stones under their sleeping bags out on the heath.
To live, usually luxuriously.
dec·a·dent Adjective: Characterized by or reflecting a state of moral or cultural decline. Noun: A person who is luxuriously self-indulgent.
To feed to the full; to feed luxuriously; to glut; as, to pamper the body or the appetite., To gratify inordinately; to indulge to excess; as, to pamper pride; to pamper the imagination.
The word "luxuriously" refers to something done in a manner that is extravagant, sumptuous, or characterized by great comfort and elegance. It often implies indulgence in high-quality materials or experiences that go beyond basic needs, suggesting an opulent lifestyle. For example, a luxuriously decorated room might feature fine furnishings and rich fabrics, creating a sense of wealth and sophistication.
Cleopatra, like all the Ptolemies, lived lavishly, luxuriously, and extravagantly.
The adverb form of the word "luxurious" is luxuriously.An example sentence is: "the hotel spa was luxuriously relaxing".
The luxuriously deep flavor of Ghirardelli premium baking chocolate bars creates desserts with chocolate intensity that lingers.
The assumption in the question is not accurate. In Poland and Lithuania, for example, most Jews were poor at the time.
They were hunted too much for their luxuriously soft fur. That fur was used to keep the hunters warm when they hunted in cold seasons. Hope that helps.