Progression of Recently Introduced Surnames into the USA
Ancestry.com has an interesting little feature that helps for newly introduced surnames. With a gap of 40 years, you can check the progression of a surname as it appears more often in census records. Obviously this is very biased toward males in the population and larger families with children still living at home. But for some names, it is of interest.Kosak Surname
So Kosak was introduced by Slovenians and some Slovak's. For Slovakia, they have a slightly different spelling that can lead to a different spelling in America. But some used this form of the name. Shown here is the occurrence of the name in the 1880 US census (rare) and then again in 1920. It is much more common due to the heavy influx at the turn of the century from those countries. The original Slovenian is Košak which often became Kozak, Koshack or simply Kosak as shown here.
Harr Surname
Much to my surprise always (as I am one), the Harr surname is more common than expected. Even in 1840, there is a concentration in Pennsylvania, Ohio and into Indiana. By 1880, you see a strong westward trend. There is some interesting caveat as well because two Horr's known to us changed their name to Harr at the turn of the century. Question is if more did so and thus led to some of the expansion.
Horr Surname
Some Horr's in the United States trace their name to England and the spelling Hoar. Others come from elsewhere in Europe. The lineage seems mixed by country, language and origin. In 1840 we see a concentration in New York and Pennsylvania. By 1880, there is quite a westward spread and explosive use of the name. Peter Horr Ancestry, documented elsewhere here, was a large contributor given he had 5 sons in the 1850's. And in fact it is likely mostly his relatives that make up most of this progression and spread. As they progressed, so did the surname it appears.
Hoar Suname
So we now are pretty sure Peter Horr has parents Robert and Lavina Hoar; and descended from Hezekiah Hoar of who came to Taunton, MA in the 1630's. Hence a look at the Hoar surname and progression.