In this excerpt from beowulf, what do the underlined words imply about shield sheafson?

so. the spear-danes in days gone by
and the kings who ruled them had courage and greatness.

there was shield sheafsonscourge of many tribes

a wrecker of mead-benchesrampaging among foes.

a foundling to start with he would flourish later on

in the end each clan on the outlying coasts
beyond the whale-road had to yield to him
and begin to pay tribute. that was one good king.

he was a fierce warrior.
he took pleasure in destruction.
he was disliked by both friends and enemies.