Here is what I was able to find.
Joshua Robb came to the US Nov 8, 1906 alone.
His family, Bathia age22, Bathia age 3, Winifred age 2 and Joshua, infant, with an Ann Robb age 28 came February 15, 1907. (Perhaps Ann is a sister to Joshua, Sr.?)
In the 1940 census, Joshua is living and working in a hotel in Maine. However, Bathia is living in Massachusetts,
living with her is her daughter Bathia, her husband Theodore Chambers and their children, Natalie age 9 and Nancy age 6.
I did not find a date or place of death for Joshua,Sr. but I did find the following.
Boston Herald, May 5, 1966
ROBB- Bathia P, widow of Joshua N Robb, mother of Mrs. Theodore J Chambers and Joshua N Robb. Service at Eaton Funeral Home, 1351 Highland Ave, May 6, 1:30 PM. Visiting hours Thursday, 7-9.
Boston Herald, July 2, 1962
Queen- Winifred R (Robb) Suddenly, June 26, in Olney Heights, Mass. Beloved wife of Norman L Queen, sister of Mrs. Theodore Chambers, Joshua Robb of Needham. Funeral was held, Thursday, June 28, from St. Matthews Presbyterian Church,Md. Burial at Arlington National Cemetery.
Wednesday, May 5, 1971
Deaths by cities & towns.
Newton Upper Falls, May 1, Robb, Joshua Nelson, Jr. Eaton, Needham.