Janin family.

Louis Janin (1803-74), a lawyer, was born and educated in Vienna and in 1828 emigrated to New Orleans, where he practiced law and invested in sugar plantations. Of his six sons, three (Louis, Henry and Alexis) became mining engineers, and one, Albert Covington Janin, became a lawyer. Albert Covington Janin practiced law in New Orleans (and later in New York and Washington), entered politics, operated a canal in Louisiana, later managed the Mammoth Cave Estate in Kentucky and married Violet Blair (1850-1932), daughter of James Lawrence Blair (1819-53) and Mary Jesup Blair (1825-1914).

James Lawrence Blair (1819-1853), a U.S. naval officer, acquired property in San Francisco in 1849 and established the first steamship line on the Sacramento River. James Blair's wife, Mary, was the daughter of Thomas Sidney Jesup (1788-1860), U.S. Army officer. Jesup's wife, Anne Heron Croghan, was a member of a Kentucky family and a niece of George Rogers Clark. Her brother, John Croghan, purchased lands containing the Mammoth Cave, which he willed to the descendents of his sister and brothers.

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