In the 1850 census, she is listed as Sabina. In all other census, she is listed as Savanna. She is listed in the Royer book.
1850 Census PA, Lancaster, Warwick Twp., p. 90, Aug 1850
John Mumma, 31, Lineburner, $1500 real estate, b. PA
Catherine " , 31, b. PA
Josiah " , 6, b. PA
Aaron " , 6, b. PA
Sabina " , 3, b. PA
Zachariah " , 9/12, b. PA
1860 Census PA, Lancaster Co., Warwick Twp., p. 505
John Mummah, 35, day laborer, $3400 real estate, $345 personal, b. PA
Catherine " , 46, b. PA
Aaron " , 15, b. PA
Josiah " , 15, b. PA
Savanna " , 13, b. PA
Albert " , 10, b. PA
1870 census PA, Lancaster Co., Warwick Twp.,
Mumma, John, 51, farmer, $6900 real estate, $1600 personal, b. PA
" , Catheriane, 54, keeping house, b. PA
" , Savanna, 23, at home, b. PA
" , Albert, 20, at home, b. PA
All of the dates of birth/deaths for Savanna and Henry D. Royer were taken from a bible that was probably owned by Henry. It was purchased from a dealer in PA by Tracy St. Clarir, aaf@ais.net. This bible was important in connecting the Mumma and Royer families.
The bible pages can be viewed at:
http://www.biblerecords.com/royer.html