By Expert Attorneys Hamilton O'Neill is a Miami family-law firm focused on high-net-worth and complex divorce matters, and it keeps a limited caseload rather than a high-volume calendar. Kathryn DeVane Hamilton, who has practiced law since 1998 and founded The Hamilton Law Firm in 2008, co-founded Hamilton O'Neill with partner William J. O'Neill in 2022. The firm draws on more than 50 years of…