William Lawrence Cahill, Jr. better known as Bill or Barnacle Bill peacefully passed on March 9, 2021. He was the first of five born to Elizabeth and William Cahill of Midtown Manhattan on November 6, 1938. They moved to Astoria, Queens in 1940 and then relocated in 1953 to Huntington, Long Island. He was a drummer in the Marching Band at Simpson, High School. He enlisted in the U.S. Navy in 1955. He served aboard air craft carriers, USS Forrestal, USS Intrepid and USS Independence to several overseas countries. Bill met the love of his life Lillian Passamonte in 1958. Bill was honorably discharged in 1959 from the Navy and held various jobs including North American Aviation and Con Edison. In 1963, Bill married Lillian and moved to Farmingville, Long Island where they had two children, Jeff & Linda. Bill dedicated 40 years to Brookhaven National Laboratory as an Electrical Engineer and retired in 2000. Bill & Lillian retired to Oak Run in Ocala, Florida in 2004. Bill was an avid drummer since the age of 14. He played countless gigs all thru Long Island and Marion County, Florida. He especially enjoyed playing with Ocala Jazz to raise funds for Marion County Hospice. Among other hobbies he loved playing golf. He was very proud of his Hole in One. Bill also adored and treasured the time he spent with his only grandchild Kieran. He is survived by his wife Lillian, children Jeff & Linda and grandson Kieran. Also his four siblings, Robert, Patricia, Lorraine and Maureen, nieces and nephews.