John (seated on left in photo) was the brother of my 3rd gr-grandmother Rachel Moore (a photo of her and her children can be found in this previous post). Rachel, John and another sibling, James, all came from County Down, Ireland and eventually settled in Keokuk County, Iowa. John and James served in the Civil War in Company A, 9th Illinois Cavalry. John was a POW held in Atlantica, Georgia for some time.
It appears that there could have been some issues between the children of John Moore by his first wife, Jennie Montgomery, and John's new family. Jennie passed away 5 Oct 1881; John married Mynettie Phelps on 23 Dec 1884. In the 1895 Iowa State Census, his children James A. (age 26), William George (21), and Marie Jane (15) are living separate from him. His son John (18) is living with the new family. James, William and Marie are still living together in the 1900 US Federal Census. None of his older children appear in the photo above, but I have had trouble locating the sons in later censuses, so they may not have lived in the area - Marie (Moore) Whisler was living in Oklahoma in 1910 and Minnesota in 1920.