Torquil \t(o)-rquil, tor-quil\ as a boy's name is of Scottish and Gaelic origin, and the meaning of Torquil is "Thor's helmet". From Torcall, which is derived from an Old Norse name that also is the source form of the Swedish name Torkel. Also possibly (Old Norse) "Thor's kettle", referring to a cauldron used in sacrifice. In Norse mythology, Thor is the god of thunder.
Torquil has 4 variant forms: Thirkell, Thorkel, Torkel and Torkill.
Torquil is not a popular first name for men and an equally uncommon surname or last name for both men and women. (1990 U.S. Census)