Sorry, what do you base that on? To me it just seems like a straightforward inspiration from the "data lake" -> "lakehouse" terminology that Databricks started (?) using.
My best guess is that Databricks and Pg_lakehouse both independently coined "lakehouse" from "data lake", and that for the latter team, it was partly a pun on Wodehouse. But the creators are welcome to chime in and confirm/deny!
(Or to say, like, "Sure...uh, we totally meant that...yes we are very literary.")
It has absolutely nothing to do with Pg wodehouse, it's a "data warehouse" sitting on a "data lake", which simply combines those two terms while keeping the "lake" and "house" metaphors quite well because you do actually get lake houses on lakes.
https://en.wikipedia.org/wiki/P._G._Wodehouse
Very clever naming!