in 1361 (at the death of her teenage niece blanca, daughter of her brother fernando manuel who himself had died in c 1350 without other children) she inherited villena, escalona and peñafiel. because juana was a maternal granddaughter of la palomilla, from her another cousin, isabel de lara who was murdered in 1361 and her young daughter florentina (d after 1365), she also inherited lara and biscay. in 1369, she became queen of castile and león.