The sylvar (also pluralized as sylvari) are a satyr-like race of the Night Fae Covenant in Ardenweald. Graceful and loyal, the sylvar serve as crafters and enchanters who create tools, foci, and magical objects to maintain the ebb and flow of existence in Ardenweald.
In Roman mythology, fauns are the equivalent of the Greek satyrs, i.e bipeds with goat-like legs and horns on their heads.
The sylvar may be a reference to the sylphs in Modern Occultism as "air elementals" invented by Paracelsus likely from the term nympha silvestris (forest nymph) in the Aeniad; "Sylvar" would roughly mean "of the forest".
^Warcraft III Game Manual, pg. 58 — The playful, frolicking creatures vaguely resemble centaurs (their cursed cousins), but have bodies more akin to woodland fauns.
^Manual of Monsters, pg. 22 — The creature has the head, arms, and torso of a night elf, but the lower body of a woodland faun.
^Alliance Player's Guide, pg. 27 — They resemble gray fauns with the upper torsos of night elf women. Alliance Player's Guide, pg. 206 — This creature has the lower body of a gray faun, but the upper body of a beautiful night elf woman.
^Shadows & Light, pg. 149 — ...the creature before you, with the torso of an elf and the body of a faun, is clearly a dryad.