My grandfather and Eric?

This is just a guess so I would REALLY APPRECIATE all the help I can get to put names on the persons in these photos!

They are taken around 1928-1931 while my grandgather visited America.
He took a lot of photos but never wrote names etc...and didn't tell much about his America-trip either.

My grandfather, Karl, had two or three uncles that had emigrated to America so my guess is that he visited them. One of these uncles name was Erik Andersson (probably Eric Anderson in the USA) and we have later found some postcards from "Eric and Betty" in Bergenfield New Jersey.
Does anyone know anything about Eric and Betty?
Eric was born in Sweden, Torsås, Brändabo in 1868.