https://tonnesoftware.com/elsie.html >Elsie™ is an uncommon commercial-grade lumped-element ("L-C") electrical filter design and network analysis program
Elsie is a diminutive of Elspeth, the Scottish version of Elizabeth. It may have been considered a variant of Alice like Ellis.
https://www.britishbabynames.com/blog/2017/02/elsie.html >Elsie started out in Scotland as a pet-form of Elspeth, a Scottish variant of Elizabeth. >In other cases, the name is listed as "Elce," "Else," or "Elcie" which suggests that the name may have been used as a form of Alice, especially given that Ellis was used as a variant of Alice at this time.
Elsie and the Brown Bunny (1921) parodies Alice in Wonderland.
https://mubi.com/en/us/films/elsie-and-the-brown-bunny >In this surreal early Cadbury advert, young Elsie dozes off after reading Alice in Wonderland while snacking on a box of chocs, and dreams of a brown bunny who whisks her away by train to Bournville.
