I just felt like posting this, because it’s
Indexation forms in Oneida, an Iroquoian language. The rows are person+subject and the columns are person+object. Or something like that.
Lounsbury, Floyd G. 1976. Oneida verb morphology. Human Relations Area Files. https://pure.mpg.de/pubman/faces/ViewItemOverviewPage.jsp?itemId=item_407974 (25 July, 2020).
(Ran across this in some slides by Michael Cysouw.)
Anyone have any other impressive grammatical tables you’d like to share?