Gregory J. Rentmeester aka "Pappy" and "Turtle", age 73, of Appleton, passed away at his home on Sunday, April 26, 2026, following a battle with lung disease.  Greg was born in Franklin Park, IL on December 16, 1952, to the late Milton and Arletta (Barlament) Rentmeester.

Greg graduated with the class of 1970 at Holly Cross High School.  On August 23, 2003 he was united in marriage to Cheryl  Vanderloop.  The couple have enjoyed 22 years together.  Greg was a jack of all trades.  He worked as a title searcher, home grill master and truck driver.

Greg loved his wife, children, and grandchildren with all his heart.  He gave of himself freely.  Greg was great at telling stories and making friends wherever he went.  He loved being outdoors, enjoyed traveling and woodworking while listening to music.

Greg will be missed by his wife Cheryl "Cheri"  Rentmeester; three children:  Joseph, Angie, and Nick (Amanda) Rentmeester, and their son Mason; stepchildren:  Bradley and Carrie Behling, and their children Kaylee, Jackson, Elias, and Oliver; Josh and Melissa Young, and their children Tori, Blake, Ella, and McKinley; Jeffrey and Jenifer Behling, and their children Olivia, Myka, Jemma, and Kevin; 2 sisters:  Kathy Barth and Sandy Rentmeester; 3 sisters-in-law:  Debbie (Jim) Smet, Diane (Kip) Meyerhofer, and Nancy (Greg) Ebben; 2 brothers-in-law:  Gary (Bonnie) Vander Loop and Jim (Paula) Vander Loop.

He was preceded in death by his parents Milt and Arletta, his best friend Jeff Garzenetti, and many aunts and uncles.

A memorial service will take place at 11 am on Friday, May 8, at the Brettschneider Trettin-Nickel Funeral Chapel.  Friends may visit at the funeral chapel on Friday from 9:30 am until 10:45 am.  In lieu of flowers, a memorial fund has been established.

The family would like to extend a special thank you to the staff at Theda Care Hospital and the staff at Theda Care at Home Hospice for the compassionate care given to Greg.