I am researching the "Tullberg", "Ekstrand", and "Avera" surnames.David Tullberg is the son of Roland Tullberg and Joan Ekstand.David is married to Sallie Avera daughter of Ray Avera and Audrey Hayes.
The "Tullberg" name is from the Mjalby, Sweden area.Herman Tullberg came to the United States around the turn of the century.
The "Ekstrand" name is from Galesburg, Illinois area.
The "Avera" is from the state of Georgia, USA.
I would be willing to share any information that I have.