Mayumi is also used as a masculine name in Filipino and Tagalog. However, it's more common for females. So, I think that the "Gender" of this name should be changed from "Feminine" to "Feminine & Masculine".Source: https://forebears.io/forenames/mayumi
Tifany Mayumi appeared in some of AlbertsStuff (a youtuber)'s videos - or at least on his new channel, Flamingo. She's a random Brazilian girl who befriended Albert after he sent her to "The Forest". She's famous among the fandom, and has about 30k followers on Roblox.