Indeed Harald Hardråde (Haraldi harðráða) is the men in question who married Elisabeth aka Ellisif, daughter of the said Yaroslav of Kiev.

Thus said the Skalds:
"Agder's chief now got the queen
Who long his secret love had been.
Of gold, no doubt, a mighty store
The princess to her husband bore." (Stuf the Blind)

"The fairest cargo ship e'er bore,
From Russia's distant eastern shore
The gallant Harald homeward brings --
Gold, and a fame that skald still sings.
The ship through dashing foam he steers,
Through the sea-rain to Svithjod veers,
And at Sigtuna's grassy shores
His gallant vessel safely moors." (Valgard)

Special thanks to Josepha who has outlined the dynastic connections of Yaroslva and his children in such detail.

Froydis, the hammer is yours!