Old Toby
From Tolkien Gateway
Old Toby was one of the most notable of the three varieties of the plant known as pipe-weed or Halflings' Leaf, grown in the region around Longbottom in the Shire's Southfarthing. It took its name from the famous old Hobbit who introduced pipe-weed to the Shire, the original "Old Toby", Tobold Hornblower, who grew the first true pipe-weed in his gardens in the days of Isengrim the 2nd about the year 1070 of Shire-reckoning. How Old Toby came by the plant is not recorded, for to his dying day he would not tell.