Yes, that's true, but non-Christian peoples still kept track of their kings' lines. Many of these connect up to their equivalent of a supreme deity. Persian lines, for example, end up at Ahura Mazda, the main deity in Zoroastrianism.
The question I would ask I understand that the language of God is poetic. or metaphorical in that way that I believe it would help us understand why Jesus said without parables he spoke not hiding the spiritual understanding from those who do not hear the interpretation as a signified language . Like in interpreting the word of God prophecy in Revelations . Revealing not only did he inspire the word but also signified it even calling it the hidden mana in chapter 2. In that way we would take the things seen the temporal like the key in Revelation 20 understanding it is the gospel the key that loosens and bind like a chain to represent the unchanging debt of a bottom less pit. Never to rise to new spirit life, as with other earthly things seen to view the Holy unseen eternal place, again as the signified language of God .
Revelation 1 King James Version (KJV) The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and he sent and "signified" it by his angel unto his servant John: