MCMAHON- Gregory of Old Brookville, NY on October 8, 2021. Beloved husband of his late wife Susan. Loving father of Evin Maione (Michael) & Gregory McMahon (Meghan). Cherished grandfather of Hudson, Chloe, Claire, Gregory, Silas and one on the way. Dear Brother of Maureen Hussing (David) and his Late brother Lawrence McMahon. Visiting Sunday, October 10 from 2-4pm & 7-9pm at Whitting Funeral Home 300 Glen Cove Ave., Glen Head, NY 11545. Funeral Mass Monday, October 11 at 10am at St. Boniface Martyr Church, Sea Cliff, NY. Interment Tuesday, October 12 at 10am Holy Rood Cemetery, Westbury, NY.