The Liverpool pair started the Young Lions’ U21 European Championship qualifier in Andorra, which ended in a 3-3 draw after the hosts equalised in stoppage time.
Jones played 75 minutes and created his side’s second goal before going off, while Williams – who stepped up from the U20 squad ahead of the trip – completed the full match.
Elsewhere, Virgil van Dijk and Georginio Wijnaldum started for the Netherlands in their 1-0 defeat by Mexico in Amsterdam.
Van Dijk played the opening half of the friendly, while Wijnaldum was withdrawn shortly after the hour mark.