It is all in pronounciation. Plachko in English, PLAC'KO in Slovak and Placsko or Placzko in Magyar/Hungarian.
The Placskos that passed thru Ellis Island were mostly from Brezova/ Brzova. Few listings for Plac'ko in Brezova pod Bradlom's phone book.
www.zoznamst.sk Slovak Republic's phone site
The name BOOR seems to be from around Brezova pod Bradlom, Myjava. In the phone book at least. The name KARLIK lists thru the whole republic.
http://mapy.atlas.sk for location of a town
www.hosmanek.com/slovakwww.village.skwww.our-slovakia.comwww.slovakfolkcrafts.comwww.slovakinstitute.comwww.tatry.skwww.zamky.skwww.slovakimportcompany.comhttp://feefhs.org/slovak/frg-slrp.html The LDS-Mormons (Family History Center) have filmed the church records so you can order the films and gather ancestral information.
www.bmi.net/jjaso