Šuwardata (Shuwardata), also Šuardatu, is understood by most scholars to be the king of the Canaanite city of Gath (Tell es-Safi), although some have suggested that he was the 'mayor' of Qiltu (Keilah?, or Qi'iltu), during the 1350-1335 BC Amarna letters correspondence.
The other 5 letters do refer to the following: Qeltu-(Qiltu, Keilah:); silver (as mercenary pay); the Sun, (as Rê); the archer-forces; and the only reference to Rahmanu, an Egyptian official, (letter EA 284, "The powerful hand of the king").
To the king, my lord, my god, my Sun: Message of Šuwardata, your servant.
The king, my lord, has written me, "Enter and pay me homage."
"Say to the king, my lord, my Sun, my god: Message of Šuwardata, your servant, the servant of the king and the dirt at your feet, the ground you tread on.
[אפסי] ((i.e. 'up-si-hi='borders' referring to article: Upu, also of the "Amarna letters"-?, putting Shuwardata's location on the perimeter?))