Rattet PLLC, a three-lawyer bankruptcy law firm in White Plains, is merging with midsize firm Davidoff Hutcher & Citron, according to its principal Robert Rattet.

Rattet said in a brief interview in Manhattan bankruptcy court Thursday that the merger would be effective Jan. 1, and that his firm’s space would become the Westchester office of Davidoff Hutcher. An unspecified number of support staff are also making the move.