Pharaoh is a word that's not spelled how it sounds, and it's also a pinball game from 1981. They could have had a theme going if they named the game Desert Lord.
Developer Credits#
A copyright message, programmer credit, and build date are in the second CPU at 0x6ED1 (0xED1 on speech chip 4).
COPYRIGHT-WILLIAMS ELECTRONICS-4/23/81-JK-"JK" is probably John Kotlarik, who worked on sound and game design at Williams Electronics in the early 80s.
(Source: Original TCRF research)