Lord Janner died in December 2015, shortly after a judge ruled his dementia left him unfit to stand trial over alleged child sex abuse offences.
In 2017, six men who alleged Lord Janner abused them dropped a civil case against his estate.
Having accused Lord Janner and other figures from the political and military establishment - including former Home Secretary Lord Brittan - of abuse, Beech was convicted on Monday of 12 counts of perverting the course of justice and one of fraud. He will be sentenced on Friday.
“Even now seeing my dad’s name attached to his and the false allegations made makes me sick. It put my mental health under huge strain,” said Rabbi Janner-Klaussner.
“Luckily for us dad skilled us up to respond to this kind of extreme situation. He gave us the skills of resilience and inner strength so we have coped.”
She said she had received "a daily torrent of abuse" in the last few months with people sending antisemitic abuse to her about her father often invoking the blood libel that said he "ritually rapes and murders children."
She said: "Particularly in the first few months, I received a daily torrent of abuse for being a religious leader who was defending my father against false allegations. We were a lightning rod for this modern day blood libel."
The unmasking of Beech, whose fraud conviction related to a £22,000 criminal injuries payout he falsely claimed for being raped by Jimmy Savile, showed there was “a problem with the British justice system," she said.
“We have a system where people are believed instantly before the evidence is examined instead of being listened to compassionately and the allegations properly investigated.”
“People were able to accuse him without a shred of evidence and were believed straight away,” his daughter said.
Support from the Jewish community had been “wonderful” and she said the news about Beech would help to “re-calibrate the moral panic around these sorts of allegations.”
Rabbi Janner-Klausner said individuals who accused her father of sexual assault and tried to get compensation from the family “dropped their claims when we said we would go to court.
“This is the problem with naming people when they are accused because it is what compensation lawyers rely on.
“They rely on pursuing people for money because they know that most people are not as resilient as we are, they don’t want to go through the stress, anguish and anxiety of turning up in court.
“We were happy to go to court because we are strong and we knew dad was innocent.”
Beech's trial heard he was previously convicted of possession of indecent images of children and was called a "committed and manipulative paedophile" by the prosecution.
Rabbi Janner-Klausner's brother, Daniel Janner QC, is helping Sir Cliff Richard to campaign for a "re-balancing of the legal system", calling for anonymity for sexual offence suspects before they are charged.
Sir Cliff is one of several well-known figures backing the campaign group Falsely Accused Individuals for Reform (Fair).
The group’s parliamentary petition calls for a change in the law that so those suspected of sexual offences have anonymity until they are charged, unless there are exceptional circumstances.
“Part of the problem is they are named as soon as they are accused,” Rabbi Janner-Klausner said.
She said the family were also concerned that the Independent Inquiry into Child Sexual Abuse (IICSA) was continuing to explore a dedicated investigative strand into Lord Janner, and will hear from his other accusers with no cross examination.
The inquiry was set up to examine claims against local authorities, religious organisations, the armed forces and public and private institutions - as well as people in the public eye.
“As a rabbi, I think it is very important that we look into the responses of the religious organisations when it comes to abuse and I will be taking part in the inquiry when it comes to that concern.
“But what isn’t ok is that the individuals who dropped their claims against my dad are going to be able to say what they want as part of the inquiry with no cross examination.
“When we have tried to contact those leading the inquiry to ask why they are continuing this strand they hung up the phone on us.”
The IICSA has been approached for comment.
