person
Spiridon Matveyevich
also: Спиридон Матвеевич, Спиридону Матвеевичу
Named in Chekhov's closing regards to Leikin alongside Praskovya Nikiforovna and Fedya (Leikin's wife and son); presumably a member of Leikin's household or circle, but not independently verified against a public-domain source and not otherwise identified in this corpus.