1609, “Everie Woman In Her Humor”, in A Collection Of Old English Plays, Vol. IV.:
And then to Apollohollo, trees, hollo.
1922, Jacob Grimm and Wilhelm Grimm, Grimm's Fairy Stories:
Presently up came the clerk; and when he saw his master, the parson, running after the three girls, he was greatly surprised, and said, "Hollo! hollo! your reverence! whither so fast!
1798, Samuel Taylor Coleridge, “Rime of the Ancient Mariner”, in Coleridge's Ancient Mariner and Select Poems:
And a good south wind sprung up behind; The Albatross did follow, And every day, for food or play, Came to the mariners' hollo!
1819, Walter Scott, Ivanhoe:
"I always add my hollo," said the yeoman, "when I see a good shot, or a gallant blow."
1910, W.F. Drannan, Chief of Scouts:
The old chief stepped to the entrance of the wigwam and made a peculiar noise between a whistle and a hollo, and in a few minutes there were hundreds of Indians there, both bucks and squaws.
Verb
hollo (third-person singular simple presentholloes, present participleholloing, simple past and past participleholloed)