Kotane has been described as "fearless" and "selfless".
She was an important role-player in the historic Women's March to the Union Buildings in the 1950s.
Parliament has said it is mourning the loss of struggle stalwart Rebecca Kotane, and described her as "selfless and brave".
The wife of late former South African Communist Party (SACP) leader Moses Kotane died on Sunday, just days before what would have been her 109th birthday.
Rebecca Kotane
Twitter PHOTO: Twitter/GeoffMakhubo
Parliament's presiding officers, led by National Assembly Speaker Thandi Modise and National Council of Provinces Chairperson Amos Masondo, described Kotane as fearless and selfless.