Epiphone existed as an independent company producing high quality chordophones in New York for most of the first half of the 20th Century, (and I have covered this part of Epiphone's history elsewhere) but in 1957, in virtual bankruptcy, they were taken over by Gibson. 

With the takeover Gibson increasingly used the Epiphone brand name for the budget end of its line and for things that it didn't want to closely associated with the main brand, (like overseas production and a reintroduction of Ukuleles to test the water). I have seen post takeover Epiphone Banjos but no Banjoleles. 

In 1997 three models of Ukulele were released under the Epiphone Label, the Lanai (with a plastic fretboard), the Molokai and the Kauai. These were all fairly budget and were only in production for a couple of years. In 2009 Epiphone released some much higher quality mahogany or koa Concert scale Ukuleles in their Masterbilt Acoustic range and in 2010 some Indonesian made official Les Paul Ukuleles (as Mahalo particularly was producing a lot of LP shaped models. These have gone from 3 colour to 2 colour sunburst in 2013 and are still in production. In 2018 Epiphone put out a Tenor Ukulele copy of their Hummingbird dreadnought Guitar.
Nothing in Gibsons 2018 chapter 11 Bankruptcy appears to have affected The Epiphone brand in any way, and the new company that has taken Gibson over Gibson has also kept Epiphone