John Gill Commentary Zechariah 6:10

"Take of them of the captivity, even of Heldai, of Tobijah, and of Jedaiah; and come thou the same day, and go into the house of Josiah the son of Zephaniah, whither they are come from Babylon;" — Zechariah 6:10 (ASV)

Take of "them of" the captivity
That is, some of them that were returned from the captivity of Babylon, and who are mentioned by name: even of Heldai, of Tobijah, and Jedaiah, which are come from
Babylon ;
either with Zerubbabel and Joshua, when they came from thence; or who were now just come from those that remained there:

and you come the same day ;
this very day in which they were come from thence: and go into the house of Josiah the son of Zephaniah ;
where the above persons were; or where they were to go along with him:

this Josiah might be either a goldsmith, and therefore the prophet is sent to him to make the crowns later mentioned; or else he might be a treasurer belonging to the temple, who had gold and silver in his hands, which had been put there for the use of it.