Markham Township in 1794; they were originally from Germany but first moved to New York State. After arriving here, they acquired large tracts of land near current day Berczy Village at 16th Avenue and Kennedy Road. Illness and famine in 1795–1796 reduced the population but the others remained on the develop a settlement: Johann Niclaus Stober or John Stiver was another Berczy settler who is descendant of Charles and Francis Stiver whom established Stiver Mills Philip Eckardt who is a Berczy settler who descendant farmed lands in Markham. Eckardt is tied to the Bethesda Lutheran Church By 1851, the population was 200, served by a grist mill, a saw mill and two churches (Primitive Methodist and Presbyterian). Unionville was a police village within what was then Markham Township within York County until the end of 1970, at which time the county was reorganized into Regional Municipality of York. Unionville and the two other police villages in the township (Buttonville and Thornhill) as well as the Village of Markham were abolished and amalgamated with Markham Township, which was reincorporated as the Town of Markham (changed to city in 2012), with some of the township's lands being ceded to neighbouring Richmond Hill and Whitchurch–Stouffville. The town and the township were named after two different people named "Markham". A historic concrete bridge carrying Unionville Main Street was built by Octavius Hicks in 1909. The name "Unionville" remained a valid postal address until the early 1990s at which time most addresses were changed to "Markham". In 2009, Markham Town Council reinstated the name "Unionville" for that portion of postal addresses within its Ward 3, which lies between Warden, 16th, McCowan and the 407. However, the Post Office used "Unionville" as the postal address for a larger delivery area that included the farms and later urban areas that it considered to be "in Unionville". Unionville's historical boundaries, therefore, may be based on the historic Post Office delivery area for the name "Unionville". These varied somewhat over a century and a half, as neighbouring post offices came and went, but at some time or other the following areas had a "Unionville" address: Highway 7 and southward: all of the area north of Steeles between Woodbine on the west and McCowan on the east, including both sides of Woodbine, McCowan and Highway 7. North of Highway 7: all of the area to 19th Avenue between Warden on