Theresa Ann Sanchez-Webster, 67, passed away December 29. 2025 after a prolonged battle, surrounded by loved ones.

She was born August 12, 1958 to the beloved, late Stewart and Lavinia (Doxtator) Webster.

Theresa worked for many years in the Accounting Department for the Oneida Nation, where she was respected for her dedication and commitment.

Theresa met Isaac Cornelius, and together they shared many years as devoted life companions.

Theresa was known for her outgoing personality and her enormous heart. She never met a stranger—only friends she had yet to know—and wherever she went, she left behind warmth, laughter, and connection. She had a deep and abiding love for the cats she raised throughout her life, caring for them with the same devotion she showed to everyone she loved. Singing was another of Theresa's great passions, and her beautiful voice was a gift she freely shared. Music filled her life and the lives of those around her, reflecting her joy, kindness, and vibrant spirit. She will be remembered for her compassion, her love of music, and the genuine way she touched so many hearts.

She is survived by her companion in life Isaac Cornelius, daughter Olivia (Andrew Biehl) Webster, her siblings; Edward (Joanne) Webster, Joe Webster, Barbara Webster, David (Mary) Webster, Brenda (Mike) Ninham, Jackie Webster, as well as numerous nieces and nephews.

She was preceded in death by her parents, and siblings, Gordy Webster, Ken Webster, Tom Webster, and Pat Webster.

Friends may call at Ryan Funeral Home 305 N. Tenth Street, De Pere from 9:00AM Saturday, January 10, 2026. The Oneida Hymn Singers will sing at 10:30AM followed by a funeral service at 11:00AM. Burial will follow at Oneida Sacred Burial Grounds.

Theresa, your incredible kindness, endless love, and the sunshine you shared with everyone around you will never be forgotten.