Index: src/wp-admin/includes/class-wp-ms-themes-list-table.php
===================================================================
--- src/wp-admin/includes/class-wp-ms-themes-list-table.php	(revision 50955)
+++ src/wp-admin/includes/class-wp-ms-themes-list-table.php	(working copy)
@@ -728,6 +728,18 @@
 			);
 		}
 
+		if ( $theme->parent() ) {
+			if ( $theme->parent()->get ( 'ThemeURI' ) ) {
+				/* translators: %2$s: theme name */
+				$child_theme_meta = sprintf ( 'Child theme of <a href="%1$s">%2$s</a>', esc_url ( $theme->parent ()->get ( 'ThemeURI' ) ), esc_attr ( $theme->parent ()->get ( 'Name' ) ) );
+			} else {
+				/* translators: %s: theme name */
+				$child_theme_meta = sprintf ( 'Child theme of %s.', esc_attr ( $theme->parent ()->get ( 'Name' ) ) );
+			}
+			/* translators: %s: theme name */
+			$theme_meta[] = sprintf ( __ ( '%s' ), $child_theme_meta );
+		}
+
 		/**
 		 * Filters the array of row meta for each theme in the Multisite themes
 		 * list table.