as in:

My nation.

But frankly, I have never heard of this spirit (nor of the other 71). What is the source of this concept?

Amy - One of the 72 spirits of Solomon. Said to be supreme president of hell. He will trade knowledge for the human soul.

Please visit the site mentioned below. It contains explanation about all 72 spirits:
http://www.1freespace.com/adoptademon/demonnames.html

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Note added at 2002-09-06 20:10:11 (GMT)
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King Solomon


The legendary king of Israel, King David\'s son and successor, which reign became known as Israel’s golden age. His date of birth is placed between 975 and 970 BC, and his death between 928 and 922 BC.

Building on David’s achievements, Solomon instituted a proficient centralized government, with a professional army and an advanced trade network. Above all, he poured attention on Jerusalem, raising superb public buildings and palaces, and carrying out his father’s plan to construct a Temple for the Lord, worthy to house the Ark of the Covenant.

Solomon had about 700 wives and 300 concubines. Many of the exotic women were in fact living treaties. He sustained alliances by taking wives from the family of every ruler willing to sign a treaty. He even kept mighty Egypt out of Israel by marrying an Egyptian princess, daughter of a pharaoh.

By loving so many foreign women and allowing them to continue their own forms of worship corrupting the Holy City with their exotic rituals and gods, Solomon not only tolerated this paganism but also participated in it himself. Some even say that he became a skilled sorcerer. According to one of the many legends about him, Solomon used pagan magic to imprison 72 rebellious evil kings into a brass vessel, throwing it then into a deep lake, where they were supposed to stay until the end of time. In an attempt to find great treasure, the Babylonians rescued the vessel and broke it open, allowing the demons to escape. These devils became known as the 72 spirits of Solomon.



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Note added at 2002-09-06 20:11:11 (GMT)
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the second quotation was taken from \"Occultopedia\" at:
http://www.occultopedia.com/k/king_solomon.htm

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Note added at 2002-09-06 20:47:48 (GMT)
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Additional info (and links) about this spirit:

1.

Name(s)- Amy, Avnas
Position- Great President
Rules over- 36 Legions of Spirits
Appearance- In the form of a Flaming Fire, but after a while puts on the shape of a Man.
Powers- Makes you wonderfully knowing in Astrology and all the Liberal Sciences. Gives good familiars and reveals Treasure kept by Spirits

from: http://www.geocities.com/xeroiii/goetia/8Goetia.htm
http://www.geocities.com/xeroiii/goetia/8GoetiaI.htm#Amy

2. http://w3.one.net/~browe/pdf/goetia.pdf
This link takes you to pdf version of Goetia (Evocation of 72 demons associated with the Shemhamphorash, and (in pairs) with the decanates of the zodiac. A substantially reformatted version of the Mathers/Crowley/deLaurence edition.) and you can find additional info about Amy on the 30 page of this pdf document.







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Note added at 2002-09-07 00:37:22 (GMT)
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Comment to John\'s answer :
Not everything pronounced as “amy” has relevance to Hebrew word ayn-mem-yod – “ami”.

I have not found any proof that the name of the spirit Amy has meaning of “my people” in Hebrew.