Arcana Coelestia #3421
3421. 'And he called them names' means the essential nature of them. This is clear from the meaning of 'calling the names' as the essential nature, dealt with in 144, 145, 1754, 1896, 2009, 2724, 3006, 3237. And since calling the names or the name means the essential nature, the expression calling without the addition of 'the name' therefore means in the internal sense of the Word to be of some such particular nature, as in Isaiah,
Hear this, O house of Jacob, who are called by the name of Israel and who came out of the waters of Judah. For they are called after the city of holiness, and upon the God of Israel they place their reliance. Isaiah 48:1-2.
Here 'being called after the city of holiness' stands for being of some particular nature. And in Luke,
Behold, you will conceive in the womb and will bear a son, and you will call His name Jesus. He will be great and will be called Son of the Most High. Luke 1:31-32.
'Being called Son of the Most High' stands for His Essential Being (Esse).
Arcana Coelestia #3237
3237. 'And her name was Keturah' means the essence of this Divine Truth. This is clear from the meaning of the word 'name' as the essential nature, and of 'calling by name' as knowing the essential nature, dealt with in 144, 145, 1754, 1896, 2009. Now because one does not speak of the nature of what is Divine but of the Esse of this, 'name' here means the essence, indeed the essence of Divine Truth - Divine Truth being meant here by 'the wife', to whom 'her' refers. For here 'the wife' means Divine Truth, see just above in 3236. From this it is evident what 'Keturah' in general embodies.