The Stone of Scone is the Stone of Destiny but it looks as if Milesius is almost contemporaneous with Solomon. It looks like Jeremiah brought the Stone, not Milesius. The three queens aren't the three daughters and were killed by earlier Milesian forces. Scota wasn't the daughter of Zedekiah, Tea Tephi was. Jeremiah appears to have died in Ireland and in his tomb was a starmap and a diagram showing their voyage to Ireland. Jeremiah, Baruch, Ebed Melech, and the two sisters (looks like there was only two, not three) are the travelers that left Egypt. One was left either in the stopover in Palestine or the stopover in Spain. They arrived in Ireland in 583 B.C. Tea Tephi (who's described as being very pretty) married a Milesian king or prince of Ireland. Here's a summary of some of the stuff I found.
Might they be the same story? (Maybe the dates are in error?) The dates on the Irish History sites about their pre-history are all over the map.
No, it looks like Ireland was ruled by six queens and kings, each having a year's turn to rule. It was Eire's turn when the Milesian forces overran them, hence the name stuck.
http://indigo.ie/~legends/dates.html.
Notice that they indicate that the 'Lia Fail' (Stone Of Scone) arrived in Ireland in 1896BC.