Charles Ellicott Commentary Daniel 1:3

"And the king spake unto Ashpenaz the master of his eunuchs, that he should bring in [certain] of the children of Israel, even of the seed royal and of the nobles;" — Daniel 1:3 (ASV)

Ashpenaz ... his eunuchs — that is, the courtiers or attendants on the king. (See the marginal translation of Genesis 37:36; and compare Jeremiah 39:3, where a Rab-saris, or chief of the courtiers, is mentioned. See also Isaiah 39:7.)

The king’s seed. — According to the story of Josephus (Antiquities 10.10.1), Daniel and the three holy children were all connected with Zedekiah. The context makes this opinion perfectly admissible.