Who were the helpers in the secret annex?

Anne Frank: The Diary of a Young Girl is the published version of a diary kept by a young Jewish girl who was forced to go into hiding during the Holocaust in order to escape persecution.  Anne Frank hid with her family in the annex of her father's office building.  Also staying with them was the van Pels family and Fritz Pfeffer.  
However, they could not do this alone--once they went into hiding, they could not leave for any reason or they might be taken away or even killed.  Therefore, they needed someone to take care of their needs, such as food and water.  They were very lucky, because they had six incredibly brave people working in the office below helping them hide and survive.  The person most noted in Anne's diary is Miep Gies, who often brought the people in the annex small gifts and surprises even though extra food was very hard to come by at that time.  Also helping them were Bep Voskuijl, Jo Kleiman, Victor Kugler, Jan Gies, and Johan Voskuijl.  All of these people put themselves into grave danger by helping Anne Frank and her family--if they were ever caught, they would have all been sent away to concentration camps or killed.  
https://www.annefrank.org/en/