Conaniah

A man, in the time of the Divided Monarchy · named in 3 verses

the name means Jah has sustained Strong's Lexicon

Conaniah, a Levite, was in charge of the offerings and distributions during Hezekiah's reign.

From Easton's Bible Dictionary

Whom Jehovah hath set, a Levite placed over the tithes brought into the temple (2 Chr. 35:9).

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

Siblings Shimei

From STEPBible's TIPNR genealogy data. A relationship the data marks uncertain is not shown here.

2 Chronicles 31:12 And they faithfully brought in the contributions, tithes, and dedicated gifts. Conaniah the Levite was the officer in charge of them, and his brother Shimei was second.
2 Chronicles 31:13 Jehiel, Azaziah, Nahath, Asahel, Jerimoth, Jozabad, Eliel, Ismachiah, Mahath, and Benaiah were overseers under the authority of Conaniah and his brother Shimei, by appointment of King Hezekiah and of Azariah the chief official of the house of God.
2 Chronicles 35:9 Additionally, Conaniah and his brothers Shemaiah and Nethanel, as well as Hashabiah, Jeiel, and Jozabad, officers of the Levites, contributed to the Levites 5,000 Passover offerings and 500 bulls.