Marilyn Jean (née Hamilton) Gatz of Mattituck passed away on Tuesday, December 23, 2025. She was 88 years old. The family will receive friends on Sunday, December 28th from 1-6 P.M. at the DeFriest-Grattan Funeral Home in Mattituck. The Liturgy of Christian Burial will be celebrated on Monday, December 29th at 11:00 A.M. at Our Lady of Good Counsel R.C. Church in Mattituck, officiated by Father Michael Bartholomew. Interment will follow at Sacred Heart R.C. Cemetery in Cutchogue.