The moment was cathartic, inspiring women to share their stories publicly and privately. But while many accusers identified themselves and named the man they said had harassed or attacked them, fear of retaliation or social ostracism led most of them to remain anonymous or not name the attacker. Critics said this raised questions about whether the accusations would result in criminal prosecutions.

Ana G. González, 29, who works as a political communications consultant and defines herself as a feminist, set in motion the explosion of accusations when she tweeted on March 21 that a writer, whom she had named in another message as Herson Barona, had “beaten, manipulated, gaslighted, impregnated, and abandoned (on more than one occasion) more than 10 women.”

Ms. González said she had not been abused by Mr. Barona, but was speaking up on behalf of a close friend who said he had beaten her up a handful of years ago when they were in a relationship.

“I knew several women that were just too afraid and not ready to come forth, but allowed me to speak for them and name this person,” Ms. González said in an interview.

Mr. Barona rebutted the accusations a day after they were made public. “I want to categorically deny the accusations of violations and physical violence that I have been targeted with,” he said on Twitter.