William L. Winans was a Baltimore financier and railway tycoon, the son of Julia De Kay and Ross Winans.
William L. Winans worked for the firm Harrison, Winans and Eastwick in St Petersburg, Russia. He married a Londoner, Maria A. Winans (b. 1828), and had a son, Walter, (b. 1852) in Russia. He was a close friend of George Washington Whistler. He later settled in London. He had a house in Kensington Park Gardens and rented, at £8,000 a year, 200,000 acres between Beauly and Kintail, Scotland.
UK census 1881 from http://www.familysearch.org (accessed 2004).