Green Ensign
unofficial or semi-official flag flown by some Irish merchant ships from late 17th century to early 20th century
en-GB/ˈɡɹiːn ˈɛnsən/
en-US/ˈɡɹin ˈɛnsən/
unofficial or semi-official flag flown by some Irish merchant ships from late 17th century to early 20th century