Jemma is a female given name and variant spelling of Gemma, meaning gem. It may refer to the following people :Jemma Ananyan (1931–2018), Armenian politician Jemma Dallender, English film actress Jemma Dolan, member of the Northern Ireland Assembly; Jemma Griffiths, birth name of Welsh singer Jem; Jemma Lilley, English crime fiction writer and murderer Jemma McKenzie-Brown, English actress Jemma Mitchell, British–Australian woman convicted of murder Jemma Redgrave, British actress Jemma Rose, English footballer Jemma Wellesley, Countess of Mornington, British make up artist and model.