“Prolly Tree” is short for “Probabilistic B-tree”. “Prolly Tree” was coined by the good folks who built Noms, who as far as we can tell invented the data structure. We here at DoltHub have immense respect for their pioneering work, without which Dolt would not exist.
The logo is closer to do ith ub. It might summon an orcish demon patron if said with the right spell components.