Mary Lou Sheffield was born on 8 April 1875, in Mississippi, United States. She had at least 1 son and 3 daughters with John George Cawelti. She lived in Hueneme Judicial Township, Ventura, California, United States in 1900. She died on 7 May 1943, in Los Angeles, Los Angeles, California, United States, at the age of 68.
English: habitational name principally from Sheffield (Yorkshire), but perhaps also from Sheffield Bottom in Burghfield (Berkshire), or Sheffield Park in Fletching (Sussex). The Yorkshire place takes its name from the river Sheaf, itself from Old English scēath ‘boundary’, + Old English feld ‘open country’, while the Berkshire placename derives from Old English scēo ‘shelter’ + feld. The Sussex placename comes from Old English scēap ‘sheep’ + feld.