Simple past tense and past participle of hollo.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "holloed" in a sentence
"The boy no sooner saw him mount his horse, than he holloed out to him that, rather than he should spoil his white-footed nag, he would come to him, on condition he would keep his fingers to himself."
"Cannonade leaped so big that the lookers-on holloed."
"I have often encountered holloed in the past tense."