On Robert’s 80th birthday, May 12 1912, the family gathered at his home to celebrate. Two photos were taken, one was a family only photo and another included friends and neighbors. Here is the family portrait.

Based on other photographs, letters and the ages of family members, I believe the people in the picture are:
First Row, L-R
Lew Jones Lewis, wife of (Seth) Albert Lewis, holding son Joseph Lewis (age 1 yrs)
(Seth) Albert Lewis, son of Robert Lewis
Evelyn Lewis, age 7, daughter of Albert and Lou
Cora Lewis, daughter of Robert Lewis
Dorothy Olive Lewis, age 2, daughter of Ellis and Nellie Lewis, sitting on Cora’s lap
Robert Lewis at his 80th birthday
Deana Gibbs Martin Lewis, 3rd wife of Robert Lewis
(Joshua Samuel) Howell Lewis, son of Robert Lewis
Emma Johnson Lewis, wife of Joshua Samuel Howell Lewis
Leland Lewis, age 4, son of Albert and Lou, sitting on Emma’s lap
John Henry Lewis, son of Robert
John Henry “Jack” Lewis, age 1 year, son on John and Kate Lewis, on his father’s lap
(Catherine) Kate Diefenbach Lewis, wife of John Henry Lewis, 8 months pregnant for son Robert Allen Lewis.
Mary Grace Lewis, age 2, daughter of John and Kate Lewis, on her mother’s lap

Second Row, L-R

Ellis Lewis, son of Robert Lewis

Harold Lewis, age 3, son of Ellis and Nellie, leaning on his father. He died at age 11.
Nellie Grace Mulvey Lewis, wife of Ellis Lewis, 8 months pregnant for daughter Nellie Grace.
Lillian Bess Lewis, age 6, daughter of Ellis and Nellie
(Robert) Ira Lewis, son of Robert Lewis
Mildred Lewis, age 10, daughter of Albert and Lou
Florence Lewis, age 12, daughter of Albert and Lou
Sallie Lewis, age 27, daughter of Howell and Emma. Sallie married Albert Lewis later this year.
Beaulah Lewis, age 14, daughter of Oliver Lewis, standing, above Ruth
Ruth Lewis, age 15, daughter of Albert and Lou. She died later this year before she turned 16. She is directly below Beualah.
Ralph Lewis, age 21. He married Ida Martin, daughter of Deana Gibbs Martin Lewis.
Oliver Lewis, son of Robert Lewis