The Rajah is from Barbados, I could not find any information on who/what The Rajah is the singer or the band. From the name I would think it's only the singer. Eight songs where released under this name. The last one was in 1981.
"Down On My Knees" was released after I had left Suriname, but songs like these where always send to friends and family and the many Suriname collectors living in The Netherlands.
There's a stamp on the scan from one of those collectors who had a record shop in Rotterdam.
This ballad is one of my favorite Caribbean ballads, I love the begging voice of the singer. He's really hurt and he wants her back.