William @M0nstrChief #289131247
189
followers (as measured)
18 April 2017
account created (per Roblox API)
15 Aug 2026, 18:02
last measured (UTC)
Username record
@M0nstrChief — observed 15 August 2026
Roblox’s API lists prior usernames without dates; the dates above are when this register observed each name, which bounds — but is not — the change date.
Groups owned (as measured)
Open data
Download this user’s observed record: username history (CSV) · record (JSON)
Also a member of
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4,294,894Windburst Banana#13657923 · Members
3,527,034Devs 4 U Productions#33064017 · Member
2,391,823The Red Army .#4802792 · Conscript
1,538,306Mojo's Games#3661096 · Member
783,956|BA| -British Army-#4972535 · [OR-2] Private
640,069br7h productions#10860091 · 👍 milk enjoyer
434,225Diversiοn Studios#15956378 · Employees
65,157The Robloxian Hospital V2#4898181 · Patient
37,589b l o s s o m e d#7210096 · ✩ Members ✩
6,956LIO Inc.#5281237 · Customer
2,688Grayson's Gang#13572972 · ✰ . . muppets
8Membership and rank as measured from this user’s public group list.