Dazler on Family Tree Circles

Shortly before the marriage her father Alexander Bett moved to Allegheny, Pennsylvania.
Shortly after the marriage her mother Euphemia Bett and siblings William, Robert and
Annie moved to Allegheny also.
I have been unable to locate David Robertson and his wife Euphemia in Scotland after 1893
and wonder if they also moved to Allegheny.
The Bett family are listed as BETTS in the USA census for 1900 and 1910 in Pittsburgh Ward 10.

Any help greatfully received.

Darron Robertson

Update: Euphemia Robertson (Bett) died 1 Sep 1893 complications of pregnancy.
Still haven't benn able to trace David Robertson

Darron Robertson