Dinsmore & Shohl LLP, one of the largest law firms in the Dayton region, will grow its national footprint through a merger with Peck Shaffer & Williams LLP, which handles public finance law. With the merger, Cincinnati-based Dinsmore will gain bond counsel strength. The firm will create a finance department and restructure several practice groups as Cincinnati-based Peck Shaffer will become a division of Dinsmore & Shohl. The merger is indicative of law firms combining practices. Last fall, Cincinnati-based…