Färentuna kyrka, Färingsö

The Färentuna runestones are 11th century runestones labelled U 20, U 21, and U 22 in the Rundata catalog that are located in Färentuna, Uppland, Sweden. Runestones U 20 and U 21 were registered separately although they come from the same original runestone and consequently are called U 20/21. The runestone U 20/U 21 is probably most interesting as it, together with the Hillersjö stone and the Snottsta and Vreta stones, tells the story of the family of Gerlög and Inga. All of the Färentuna runestones are inscribed in the younger futhark. ()