Arthur Blennerhassett (1776-1839) (1776–1839) Parents Sir Rowland Blennerhassett, 1st Baronet Millicent Agnes Yielding Children Theodora Blennerhassett Millicent Agnes Blennerhassett Siblings Sir Robert Blennerhassett, 2nd Bt. Richard Francis Blennerhassett Rowland Blennerhassett William Blennerhassett Partners Helena Jane Mullins