There was no clear admittance from the celebrity why she called herself the Swedish Killer or why she had the Instagram name SwedishKiller in the past. Maybe because she kills a lot of competition and gets the attention of her fans through the rather revealing and evocative images she posts online.  However, in around 2016, due to unknown reasons, she decided to have a more wholesome name and she switched her Instagram account name to Swedishirishmama. One could assume that she decided to drop the name SwedishKiller to something representative of the joy in her life, which is her son.