We have a number of Jaaps who lived in
Butte,
Montana in our family tree -
http://www.jaap.org.uk. Andrew Jaap, b 1867 in
Scotland emigrated to USA with his parents in 1869. He died in
Butte,
Montana in 1927. He had 3 sons and a daughter - 2 sons died in
Butte in 1941 and 1943. There was a granddaughter called Elizabeth who was born in
Butte in 1927.
Patricia Somerville's reply to your posting mentioned Alexander Jaap. He was the great-uncle of Andrew Jaap above, and lived in
Scotland from 1800 till his death in 1866.
We'd like to hear from you if you can make a link between your mother and our family.