Monogramming linens and clothing was popular through Victorian times - when a bride-to-be would be expected to have a trousseau of monogrammed linens. Victorian monograms were often quite ornate, usually based on Script or Medieval lettering styles and ornamented with scrolls and flowers.
Monogramming took on a new, modern look in the 1930s, influenced by the Art Deco movement.
Julia Coburn, in "Make Your Own Monograms" (Ladies' Home Journal, May 1935), indicates that "... if you wish to be in fashion today, the design of your monogram must be in streamline simplicity. And---Gothic or modern---monogram you must, for everything is initialed these days"
Ornate decoration and intertwined letters were replaced by stylish, streamlined monograms.
In the 1940s and 50s modern lettering styles continued to be popular. Traditional script lettering was also used, though not as extravagantly decorative as Victorian styles.