Mattie was born on a farm near Oswego, Kansas, the daughter of Albert W and Mattie L Schott. She attended Labette County Schools and graduated from the Labette County Community College. She taught for several years in the rural Labette County schools.
On May 8, 1938, she married Glenn E. Knewtson at Bartlett.
Mattie was a homemaker and dvoted mother as well as co-owner of ABC Coffee Services.
Burial: Elm Grove Cemetery Edna Labette County Kansas, USA
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