Thelma Jean Carlson, 86, of Russell, PA, passed away after an extended illness at the Rouse Home in Youngsville, PA, on Saturday, October 17, 2026.

She was born on January 28, 1940, on Cider Mill Hill in Akeley, PA. She was born to the late Charles Jackson and Frances (Robinson) Jackson of Scandia, PA, and was the foster daughter of the late Melvin and Edith Peterson of Sugar Grove, PA.

She was married on March 5, 1960, in Cable Hollow Church to the late Harry N. Carlson.

Thelma attended Lottsville Grade School from grades 4-8. She graduated from Youngsville High School in Class of 1959. She attended the Lottsville Methodist Church.

She primarily was a homemaker to raise her children, but she also worked at New Process Co., Warren General Hospital in Central Supply and Kay Bee Toy Store at Warren Mall. Thelma loved to research for anything Biblical and working on family trees. She had a special love for studying Bible Prophecy. Her favorite Bible Verse was John 14:6, “Jesus saith unto him (Thomas), I am the way, the truth and the life; no man cometh unto the Father but by me”

Thelma is survived by 2 daughters: Rebecca S. (Dane) Peterson and Johanna R. Greenland, both of Warren; 2 sons, Richard L. (Heike) Carlson of Erie, PA, and Jeffrey S. (Brenda) Carlson of Frewsburg, NY; one foster sister, Vivian (Ray) Moon of Mercer, PA; 3 sisters: Bonnie Sherrard of Warren, PA; Joyce (Levi) Carlstrom of Parkton, MD, and June (Keith) Black of Coweta, OK, and one brother John C. (Tammy) Jackson of Scandia, PA; several nieces and nephews, 5 grandchildren: Olivia and Erin Carlson of Erie, PA; Jeremy Church, Nerissa Greenland, and Katherine Harkins, all of Warren, PA; 3 step-grandchildren, Benjamin (Allie) Pollaro, Christine (Devin) Perez, both of Frewsburg, NY, and Lily Gordon of Jamestown, NY; 5 step great-grandchildren, Omi Rose, Damon, Kaydin, Sapphire and Tony Pollaro, all of Ashville, NY, Michael, Jr. and Maxwell Gordon of Jamestown, NY, and Odin Pollaro of Frewsburg NY.

In addition to her parents, foster parents, and husband, Thelma was preceded in death by one son, Ronald L. (twin to Richard), four brothers; Allen Jackson, Charles Jackson and Robert Jackson and Donald Jackson, and a sister, Vivian Carol Jackson, one niece, Marsha Lynn Black, 4 foster sisters, Lucille Stewart, Lois Stewart, Helen Faust, and Ruth Ann Davis, and two foster brothers, Charles O. Peterson and John M. Peterson.

Funeral arrangements have been entrusted to Peterson-Blick Funeral Home, Inc. 1003 Penna. Ave E, Warren, PA, 16365. Visitation will take place at the funeral home on Thursday, October 22, from 10am-11:30am, with a funeral service to follow at 11:30am, Rev. William Beatty, officiating.

Interment will take place at Pine Grove Cemetery in Russell, PA, 16365.

Memorial contributions in Thelma’s name may be made to Hospice of Warren County, 1 Main Ave, Warren, PA, 16365, or Cable Hollow Church, 3157 Cable Hollow Rd, Russell, PA, 16345.

Online condolences may be made to the family at www.petersonblickfuneralhome.com or on the funeral home’s Facebook page.