I have a Mary Cost, daughter of Henry C. and Mary Cost who married an Alfred White in 1856 in Campbell Co. Kentucky. I am a descendant of this White line which originated in England and immigrated to Tennesee and then Cincinatti Ohio. There the White family established the White & Sons Co. which imported marble. This information was provided by the book History of Hamilton County, Ohio and my mother. Is this possibly the Henry Cost and Mary Arison you mention? Can you verify/connect any of the above and/or provide any further information on this Cost line. Your help is much appreciated. Thankyou.