most > greatest

9 Their beams shall oft break forth, that men them fair may see.

that > [so that]

303.45

For Rhodoricke, whose surname shalbe Great,
2 Shall of him selfe a braue ensample shew,
That Saxon kings his friendship shall intreat;
4 And Howell Dha shall goodly well indew
The saluage minds with skill of iust and trew;
6 Then Griffyth Conan also shall vp reare
His dreaded head, and +the old+ sparkes renew
8 Of natiue courage, that his foes shall feare,
Least backe againe the kingdome he from them should beare.

7 the old > th'old 1609

1 "For Rhodri, whose surname shall be Great,

Rhodri > (Rhodri the Great of Wales, ruled c. 844)

2 Shall of himself a brave example show,

brave > splendid; brave