TERMINOLOGY
        Aes Si, a catchall term for noble faeries... means "the Folk of the Hills"  Pronounced "ay-iss SHEE."
        Daoine Maite, "the Good People", pronounced "theena MAY-cha."
        Daoine Si, "the People of the Hills", pronounced "theena SHEE."
        Fir Si, "the Men of the Hills."  Pronounced "feer SHEE".  Refers to all Si males.
        Baobhan Si, "the Women of the Hills."  Pronounced "bah-VAHN shee".  Refers to all Si females; also a particular type of noble faerie that dresses in green and drinks blood. See below, under Leanaun Si.

THE DAOINE SI (IRELAND)
        The "People of the Hills."  Said to have once been the godlike Tuatha de Danaan; they have many Rath-Kings, and their High King is Finvarra of Knockma, thought by some to be King of the Dead.  They take great pleasure in fighting and are skilled chess-players.  The Daoine Si passionately love beauty and luxury, and have a total contempt for thrift and economy.  They may be kind or cruel, have the pale skin of one who has never seen the sun, and walk among mortals on the Sacred Days (White and Green Sabbats).  They have involved themselves in the making and unmaking of kings, and searched the mortal world for poets and prophets, musicians and craftsmen of great skill, to take back into Faerie.  Also, no Faerie Lord may give birth or die without mortal aid -- they can neither impregnate each other nor kill each other.  Lords who fall in Faerie wars arise the next day unless killed by a mortal, or some similar thing.  Faerie Ladies and Lords can gain this "mortal power" by draining the life from a mortal, and thus kill other fae or give birth.

THE LEANNAN SI (IRELAND)
        Pronounced "leh-NAHN shee."  The "Faerie Mistresses"... these are the women of the Si.  The Leannan Si passionately love beauty and luxury, and have a total contempt for thrift and economy.  Found on the Isle of Man, and always female, they are blood-sucking vampiresses, and include such types as the Glaistig and Baobhan Si.  In Ireland she is the Muse of Poets, and those inspired by her love lead brilliant (though short) lives.  Also known as the Baobhan Si; their Wilder cousins are the Glaistig.  In Ireland they are known to wander through towns and knock on doors, and move between kind and terrible moods.  On the Isle of Skye, they wear yellow robes and are invisible to all but those they pursue; the "Lhianon" either embrace and slowly drain the blood of these unfortunates, or charm them and cause them to pine away with longing.  One of these Faerie Mistresses is sworn to be guardian of the Fletcher family, and was involved in the giving of the legendary Fairy Cup.
        The Baobhan Si who are kin to the Leanan Si are a particular type of noble faerie that dresses in green, has the hooves of a deer and drinks blood; these faeries can also take the form of a hooded raven.  These faeries are as often Wilders and Elementals as they are Nobles; when they are Wilders they are often called Glaistig.

THE SLUAGH SI (SCOTLAND)
        Pronounced "sloo-AH shee."  Meaning "the Silent Host", thsi term commonly refers to the so-called Unseelie Host of Scotland.  Unseelie is a Scots word meaning "unholy".  The Sluagh Si are commonly seen about twilight; dark and surrounded by a terrifying cloak of silence, these swarms of faeries are known for swooping down, picking up even a human or larger creature, and carrying it to dizzying heights and forcing it to participate in tormenting others before dropping it to its death miles below.
        Though often used to describe the Unseelie Host, the term Sluagh Si actually refers to the dark nobles who rule the Unseelie Host.  They are the dark lords of Faerie to whom play and beauty no longer hold much enchantment, for whom only violence, torment, and mockery hold any attraction.

LES FEES (FRANCE)
        The Nobles of France.  Female Fees are known as Dames Blanche, "White Ladies".  The Fees may be kind or cruel, have the pale skin of one who has never seen the sun, and walk among mortals on the Sacred Days (White and Green Sabbats).  They have involved themselves in the making and unmaking of kings, and searched the mortal world for poets and prophets, musicians and craftsmen of great skill, to take back into Faerie.  Also, no Fee may give birth or die without mortal aid -- they can neither impregnate each other nor kill each other.  Fees who fall in Faerie wars arise the next day unless killed by a mortal, or some similar thing.  Fees can gain this "mortal power" by draining the life from a mortal, and thus kill other faeries or give birth. (possibly having talons like birds' feet)
        There is also another kind of female Fee, forest ladies with pale green skin and hair, who seduce young mortals and lead them away into the forest, and into faerie.  Some of these dames vertes turn wild and abandon their noble courts, joining the wilder brothers, the Wood Elves.

THE GWRAGETH ANNWYN (WALES)
        The beautiful Lake Maidens of Wales who sometimes wed mortals.  They  have strange habits, and will not stay with anyone who strikes them three times, they are often seen laughing and singing at funerals but weeping at weddings and other times of joy.  Many of the Lake Maidens can teach secrets of medicine and healing.  They will warn their visitors (who are welcome, if polite) not to take anything from their islands and aquatic gardens; even a tiny flower taken from the faerie realm will cause that particular realm to be closed, never to open again in a mortal's lifetime.
 
THE HULDREFOLK (FINLAND/SCANDINAVIA)
        Icelandic Nobles.  "Hollow Folk" or "Hill Folk".  Lovely maidens with cow-tails, which they try to hide; enjoy singing in forests and pursuing mortal men, those who succumb to their advances usually lose their minds.  Also handsome men, generally benevolent but melancholy, that can be heard singing wistfully on long summer nights.  Accompanied sometimes by ugly old Wood-Wives tending cattle.  All can be seen to be only a hollow facade if viewed from behind.

THE SALFAR (GERMANY)
        German Nobles.  They may be kind or cruel, have the pale skin of one who has never seen the sun, and walk among mortals on the Sacred Days (White and Green Sabbats).  They have involved themselves in the making and unmaking of kings, and searched the mortal world for poets and prophets, musicians and craftsmen of great skill, to take back into Faerie.  Also, none of the Salfar may give birth or die without mortal aid -- they can neither impregnate each other nor kill each other.  Salfar who fall in faerie wars arise the next day unless killed by a mortal, or some similar thing.  Salfar can gain this "mortal power" by draining the life from a mortal, and thus kill other fae or give birth.   When one of the Salfar is kind, it is called one of the Liosalfar, or "elves of light"... when cruel, it is one of the Docksalfar, "dark elves".