Do they need to be 3 letters? Some 3 letter names are 1 syllable some 2. Does the amount of letters matter more than that?
Ann, Ada, Ava, Ida, Ivy, Eva, Eve, Amy, Kay, Kim, Jem, Gem, Liv, Liz, Lou, Red, Bea, Tia, Mia, Lea, Ria, Pia, Gia, Nia, Sia, Han - Hannah, Kit, Joy, May, Meg, Mog, Mya, Uma, Val, Viv, Zoe, Ari, Aya, Sue, Sam, Pam, Lua, Jen.
Jan, Jon, Sam, Joe, Tim, Tom, Tam, Zak, Ash, Ben, Kit, Dan, Dom, Rob, Red, Ray, Rex, Rio, Leo, Lee, Tye, Ian, Roy, Ali, Mac, Max, Rex, Gus, Guy, Ira, Abe, Cam, Eli, Zed, Tre, Bob, Bud.