wanting > lacking issue male > [sons]
2 He gave in wedlock to Maximian,
Maximian > (Marcus Aurelius Valerius Maximianus, surnamed Herculius.
Roman emperor 286-305 and 306-308; died 310)
3 And him with her made of his kingdom heir, 4 Who soon by means thereof the empire won, 5 Till murdered by the friends of Gratian;
Gratian > (Flavius Gratianus, 359-383, Roman emperor 367-383; killed by Maximian)
6 Then gan the Huns and Picts invade this land,
gan > did Picts > (Inhabitants of northern Scotland and northern Ireland who probably arrived from mainland Europe c. 1000 BC. Fought against the Romans in Britain in the 4th century AD. They are said to have received their name (Latin, Picti) from their custom of ornamenting their bodies with tattoos; they are also known for cannibalism and the fact that Pictish women fought alongside the men in battle)
7 During the reign of Maximian; 8 Who, dying, left none heir, them to withstand,
none > [no one as]
9 But that they overran all parts with easy hand.