Colonel Theodore Godfrey Wijesinghe Jayewardene, VD, JP, CLI (June 17, 1872 – 1945; also known as T. G. Jayewardene) was a Ceylonese (Sri Lankan) engineer, politician and military officer. A member of the State Council of Ceylon, he was the first Ceylonese commanding officer of the Ceylon Light Infantry.^[1]

Born to James Alfred Jayewardene, a Proctor who was the Deputy Coroner of Colombo, his brothers were Hector Alfred Jayewardene, Justice Eugene Wilfred Jayewardene, KC and Justice John Adrian St. Valentine Jayewardene. Jayewardene was educated at the Royal College, Colombo.^[2]

After becoming an engineer, he joined the Public Works Department in 1895 as an assistant engineer and in 1900 became a fully qualified Civil Engineer. He was elected to the State Council of Ceylon in 1933 from the Balangoda seat and held it till 1936.^[2]

He joined the Ceylon Light Infantry, a reservist regiment of the Ceylon Defence Force, in 1889 as a private. However he was later commissioned and quickly climbed through the ranks becoming a major in 1908. In 1921 he was appointed as the intelligence officer of the Ceylon Defence Force. Promoted to lieutenant colonel, he served as the first Ceylonese commanding officer of the Ceylon Light Infantry from August 1919 to August 1923. He reached the rank of colonel, the highest rank a Ceylonese could achieve in the colonial era and was awarded the Volunteer Officers' Decoration.^[2][3]

In 1905, he married Lena Attygalle, daughter of Mudaliyar Don Charles Gemoris Attygalle^[4] with whom he had a son Major Theodore Frederick, who was elected to the Parliament in 1948. His daughter Margie Jayewardene married A. F. Wijemanne, who was a senator and Minister of Justice (1965-1970). His brothers-in-law were Fredrick Richard Senanayake and John Kotelawala Sr.

One of Colombo's primary roads, Colonel T. G. Jayewardene Mawatha, has been named in his honor.

• List of political families in Sri Lanka

• The JAYEWARDENE Ancestry