SIR

sur: In the Old Testament this word in Genesis 43:20 the King James Version ('adhon) is changed in the Revised Version (British and American) into "my lord." In the New Testament the word sometimes represents aner, as in Acts 7:26; 14:15; 19:25, etc.; more frequently kurios, "lord," as in Matthew 13:27; 21:30; 27:36; John 4:11,15,19,49 (the Revised Version margin "lord"); John 20:15. In Revelation 7:14, the Revised Version (British and American) renders "my lord."

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.