The "Elizabeth Plymale" you found in the 1880 census is probably Louisa Elizabeth Plymale. She was the daughter of Gabriel Plymale and his wife Rebecca Sullivan. Gabriel had died before 1880 leaving his widow and children in Vigo County, Indiana. Rebecca did not remarry until a few years later (to James Howlett) and the children were apparently living with different relatives.
Louis Edward Plymale was the youngest brother of Gabriel Plymale.
Hannah Etta Plymale was the daughter of Hugh Plymale, who was the oldest brother of Gabriel Plymale.
Bowen Plymale and his wife Elizabeth and children moved to the area of Vigo County, Indiana, probably in the early 1850's. They later moved away, but many of the family members moved back to the area, as you can see.
Please see my Plymale page at:
http://www.ryanwadleigh.com/plymale.html for more information.
Ryan Wadleigh
ryanwadleigh@yahoo.com