https://en.m.wikipedia.org/wiki/Lemmy_(social_network)
In particular:
Lemmy was created by the user Dessalines…
…Lemmy’s co-creator Dessalines…
https://en.prolewiki.org/wiki/Lemmygrad
In particular:
Founder : Dessalines
Key people: Dessalines, Farmer Heck, CriticalResist, Forte and others
Of note:
Lemmygrad was created by dessalines and Farmer Heck.
Lemmygrad was the second Lemmy instance created, after lemmy.ml.
Hope that helped!