Which preposition to use with yann

by Occurrences 1%

And all day long the river tumbled by and all night long the tolulu-bird sang on and the huge fireflies had no other care than to pour past in torrents of dancing sparks, and nothing rippled the surface of the Yann by day and nothing disturbed the tolulu-bird by night.

like Occurrences 1%

For I thought never again to see the tide of Yann, but when I gave up politics not long ago the wings of my fancy strengthened, though they had erstwhile drooped, and I had hopes of coming behind the East once more where Yann like a proud white war-horse goes through the Lands of Dream.

on Occurrences 1%

Some years since a poet visiting that land voyaged down the Yann on a trading bark named the Bird of the River and returning safe to Ireland, set down in a tale that is called Idle Days on the Yann, the wonders of that voyage.

Which preposition to use with  yann