Thomas Plantagenet Bigg-Wither (16 October 1845, in Hampshire – 19 July 1890, in High Seas) was an English engineer and writer. ^[1]

Lovelace Bigg-Wither (1805–1874), who was Lord of the Manor at Manydown, was his father. ^[2] Charles Bigg Wither, a younger brother of his father, was thus his uncle. ^[3]

Between 1871 and 1875, he participated in an expedition in the Brazilian province of Paraná in southern Brazil. ^[4]

Upon returning to England, he published the book Pioneering in South Brazil. He also published an article called "The valley of the Tibagy, Brazil" with the Royal Geographical Society. ^{[5] [6]}

In the 1880s, he worked as chief engineer of a railroad India. In 1890, he became ill and when he returned to England, died on the ship and was buried at sea.

References