Someone who is 100% of a certain nationality. Someone could be a Greek pureblood, Bulgarian pureblood, Russian pureblood, Mexican pureblood, etc.
Sofia: Yeah me and the rest of my family are Greek purebloods.
Nina: No way! Im a Bulgarian pureblood!
Vlad: Im a Russian pureblood!
Steve: Well this is awkward....im not a pureblood
A natural born Ohio resident that still holds the blood of the ancient Ohioans within their veins. Purebloods are granted special privileges upon birth and usually become high ranking Ohio officials. However, purebloods do not pass down their pureblood genes if they breed with a regular human and hence they are extremely rare.
Ohioan: "Purebloods are privileged and deserve no more rights than the rest of us!"