William A. Brennan Jr., age 67, of North Java, New York passed away on Friday, April 19, 2024. William was the beloved brother of Terry and the late Michael Brennan, dear uncle of Jacqueline, Kelly, Connie, Kristyn and Brandi; brother in law of Donna Potkowa, devoted friend of Jeff, Craig, Pat, Don and Amy. He is also survived by several great nieces, nephews and friends. Services will be held at the convenience of the family.