Et vir

The Supreme Court just granted review in the Wonder the Goldendoodle case (credit to Amy Howe for pointing out Wonder's participation), and the name of the case listed on the court docket—"FRY, STACY, ET VIR V. NAPOLEON COMMUNITY SCH., ET AL."—reminds me of this legalese question: What does "et vir" mean in a case name, and what is its flip side?