Brendan Cox called on "all people" not to be "cowed" by what happened to his wife Jo.
He urged them to use her name as a synonym for kindness and generosity - not as a threat.
Writing in the Guardian after Conservative MP Anna Soubry was called a "Nazi" and encircled by protesters as she walked into parliament, Mr Cox said his late wife's name was "being used as a threat by more mainstream voices".
"MPs are told by national commentators to remember before voting for or against a deal, or for or against a referendum, to remember what happened to Jo," he said.
"Even some MPs and government ministers seem to be using the threat of violence as a warning to others to do their will...
"Please do not use Jo's name as a threat.
"If Jo's name is to become a synonym for anything, it should be for her kindness, generosity, optimism and her fundamental belief that we have more in common than that which divides us.
"That's what sums her up, that captures who she was and the spirit we'll need more than ever when the current political decisions have played out."
The harassment of MPs outside Westminster was condemned by Theresa May and Jeremy Corbyn in parliament on Thursday.
Labour MP Alison McGovern, a friend and colleague of Ms Cox echoed her widower's call for no-one to "use what happened" to her to "threaten others".
"Democracy cannot be stopped by intimidation", she said.
"Jo's life was a demonstration against despair. She believed that politics was not just a talking shop but an activity in which we could change the world for the better."