Early Life and Artistic Foundations William Dermod O’Brien, known simply as Dermod O’Brien, was born in 1865 at Mount Trenchard House near Foynes, County Limerick, Ireland—a landscape that would deeply imprint itself upon his artistic sensibility. He came from a family steeped in Irish history and patriotism; his grandfather was the celebrated William Smith O'Brien, a figure of national importance. This lineage instilled within him a…