Last names often have multiple origins. On a quick search it looks like Pollard is most commonly from England, then from Cornwall, and even a few from Germany. Do you have some areas that you are stuck on your family tree that some of us can look into? Sometimes more then one set of eyes looking and checking sources could be a huge help. Sometimes there are dead ends where the records were lost or simple not kept. If you can find an ancestor on https://www.worldfamilies.net/surnames/pollard/help you would have a huge clue as to where the family would be from.