Finn -- "fair" (Irish in origin)

Rachel -- "ewe" (or, a female sheep. Like the kind you slaughter)

Quinn -- one letter off from queen, "counsel", has connotations for intelligence

Puck -- Puck is a fairy or mischievous spirit, name used in Shakespeare, means "unsettled"; Noah, however, is biblical and means "rest; comfort"

Mercedes -- "Mercy"

Tina -- "Follower" (specifically of Christ, but still. TINA!)

Artie -- usually short for Arthur, but Artie itself means "follower of Athena" ancient Greek goddess of wisdom, while Arthur means "bear; eagle; stone" but also sometimes is used as reference to King Arthur of legend.

Kurt -- usually short for Curtis, in German it means "polite; well-bred; wise." In Turkish, however, it means "wolf."

Santana -- saintlike (ironic for Satan, right?); also references St. Anne (Annie, are you okay?)

Brittany -- land of Brittons. Also used in references to a 2nd century Roman goddess by the same name.

Sam -- "His Name is God" often short for Samuel. Alternatively, "God's Heart" or "Name of God"

Blaine -- "yellow" (color theory go go go!)

Sugar -- "sweet"

Rory -- "red king"

Joe -- often short for Joseph, "God will increase"

Go go go!