Well, the best candidate I found this far was actually written Olof by the priest. He might prove hard to investigate though, since his father is a "wanderer" from another parish. https://sok.riksarkivet.se/bildvisning/C0041733_00014#?c=&m=&s=&cv=13&xywh=16%2C2360%2C3905%2C2126 (https://sok.riksarkivet.se/bildvisning/C0041733_00014#?c=&m=&s=&cv=13&xywh=16%2C2360%2C3905%2C2126)
With the soldier name Malm I'm tempted to look for Ola on Malmön though, but the church books in Askum socken are lost to a fire in 1898.
Thank you again! I see that Ivar Berg is a "wanderer," but it looks like perhaps he was a wandering sailor. I did find an Ivar Berg at http://www.soldatreg.se/ (http://www.soldatreg.se/), but he died in 1789--six years before Ola Malm was born. The search continues...
Kevin
You are completely right he is a former sailor, but I'm not sure the sailors are registred on that site? Might only be land based soldiers. The last bit says "fr. Skjo sochn", but it should probably be Skee socken. I did look around for Ivar Berg but couldn't find him. The thing is, Bohuslän is pretty well covered and searcheable on the page "släktdata" but there is not much to find about Ola Malm.