Bobbsey twins

[bob-zee]

plural noun

1. two people who are often together or seem to resemble each other, as in appearance or actions.

   We called them the Bobbsey twins, because they always had the same opinions.

Word History and Origins

Origin of Bobbsey twins¹

From the central characters in a series of children's books by Laura Lee Hope, pen name of a literary syndicate; some of the books are attributed to U.S. author Lillian C. Garis (1873–1954)