Conversation so far:
Who was Dawn in relation to Tony Orlando?
Orlando sang under the condition that his name not be associated with the project, so it was released under the simple name of Dawn.
Why did Tony Orlando have a condition about singing with his real name?
He was concerned about a possible conflict of interest with his April-Blackwood duties.

Question: what song did he sing under dawn?
Self-contained rewrite: What song did Tony Orlando sing under the name Dawn?