These will war against the Lamb, and the Lamb will overcome them, for he is Lord of lords, and King of kings. They also will overcome who are with him, called and chosen and faithful." -- Revelation 17:14.
He has on his garment and on his thigh a name written, "KING OF KINGS, AND LORD OF LORDS." -- Revelation 19:16
World English Bible translation
Some object that the titles Lord of lords and King of kings only apply to Jehovah. Jehovah is spoken of a "Lord of lords" in Deuteronomy 10:17 and Psalm 136:3. The expression, "lord of lords" simply signifies one who is "lord" over others who are also "lords". In the case of Jehovah, however, he is the "Supreme" Lord who is lord over others who are also lords.
However, any one who is a Lord over others who are also lords can hold the title "Lord of lords." Another way of expressing "Lord of lords" is "overlord."
Yes, there can be two and even many who can hold the title of "Lord of lords". It is similar to the title "King of kings." Anyone who is a king over others who are also kings can hold the title "King of kings."
Artaxerxes, king of kings, to Ezra the priest, the scribe of the law of the God of heaven, perfect and so forth. -- Ezra 7:12, World English
For thus says the Lord Yahweh [Jehovah]: Behold, I will bring on Tyre Nebuchadrezzar king of Babylon, king of kings, from the north, with horses, and with chariots, and with horsemen, and a company, and much people. -- Ezekiel 26:7, World English.
You, O king, are king of kings, to whom the God of heaven has given the kingdom, the power, and the strength, and the glory. -- Daniel 2:37, World English
Jesus is made "lord" by Jehovah, the only true God; He is made lord over the overcomers who also become lords (rulers) and kings, and thus he has the title "Lord of lords" and "King of kings". -- Psalm 2:6,8; Daniel 7:21,27; Acts 2:38; Ephesians 1:22; 2 Timothy 2:12; Hebrews 1:9; Revelation 3:21; 5:10; 20:6.
In the Bible, however, only the Most High, Jehovah, holds the title "God of gods". (Deuteronomy 10:17; Psalm 136:2; Daniel 2:47: 11:36) Jehovah is God over others who are "gods", especially the "angels" (Psalm 8:5; Hebrews 2:7) and also the "gods" spoken of in Psalm 82:1,6; John 10:34,35.
The term "lord", of itself, is a more general term, and can be applied to many people who are in some way a ruler, teacher, etc, and even a more general way as respect for a man, such as with the meaning of "sir", or "mister".
Hebrew words for "lord":
If these words are used in the New Testament, they are usually rendered under forms of the word Kurios. The problem in the New Testament, however, is that usually, in the manuscripts as we have them, the holy name of God been changed to forms of the word Kurios, causing a confusion of the word "Kurios" with the holy name. In reality, the holy name of God does not mean the same thing as Kurios, and Jehovah never authorized anyone to change his name to Kurios. Nevertheless, many have misused this in their efforts to make the claim that Jesus is Jehovah.