is there any chance that you can scan just the birth place, fathers and mothers details in a higher resolution? Its really quite hard to see what it says?
Have a look at the fathers name... doesn't it say Adam E Jonson? The mothers name Mary/May I./J. Jonson? We had a patronymic naming convention back then so that would make sense. The boys names would be Adams-son.
I cannot see what the first name of the father is, starting with H...Henry?
What does it say on line 2?
The birth place is interesting, the second line looks like it ends with ...gatan. Gatan means street in Sweden.
Did his brother get married by any chance? If yes, his marriage certificate might be clearer in terms of the handwriting.
Let me know what you think and if you are able to scan it in a higher resolution, just those last bits