Petra Krause (19 February 1939 – April 2025) was a significant figure in the German-Italian communist militant movement. She gained notoriety for her involvement in supplying weapons to groups such as the Red Army Faction (RAF) in Germany and the Red Brigades in Italy. Born in Berlin, Krause was arrested in Zurich in 1975 on suspicion of smuggling explosives and arms for various terrorist organizations across Europe. Defended by attorney Bernard Rambert, she was later extradited to Italy and subsequently released after a few days. Her involvement led to a controversial sentencing in absentia by the Court of Appeals of the Canton of Zürich in 1981. Krause's connections with individuals such as the German politician and DDR agent Brigitte Heinrich and her association with leftist terrorism in Switzerland further solidified her infamous reputation. Her passing at the age of 86 was announced on 2 April 2025.

Petra Collins, born on December 21, 1992, is a multifaceted Canadian artist, director, fashion model, and actress renowned for her dreamlike and feminine photography style. Rising to prominence in the early 2010s, Collins is recognized for her distinctive female gaze approach in photography. She gained traction as a resident photographer for Rookie magazine and a casting agent for Richard Kern. Notably, Collins directed captivating short films and music videos for acclaimed artists such as Carly Rae Jepsen, Selena Gomez, Cardi B, and Olivia Rodrigo, with the latter's "Good 4 U" music video accumulating over 400 million views on YouTube as of June 2023.Collins, a Toronto native, honed her artistic skills at the Rosedale Heights School of the Arts and later pursued studies in artistic criticism and curatorial practice at the Ontario College of Art and Design. Her career took off when she began curating shows for her art collective, The Ardorous, and exhibiting her own work, leading to her first solo exhibition, "Discharge," and subsequent book publication. In 2010, she founded "The Ardorous" website, providing a platform for young female artists to challenge contemporary ideologies of femininity.In addition to her prowess in photography and art, Collins has made significant strides in directing, modeling, and acting. She has directed a documentary series, music videos, and advertisements, while also venturing into modeling for high-profile campaigns and

Petra Karin Kelly (29 November 1947 – c. 1 October 1992) was a prominent German Green politician and ecofeminist activist. She played a pivotal role in founding the German Green Party, which gained international recognition for its environmental and social justice advocacy. Kelly's commitment to ecological concerns, disarmament, and human rights earned her the prestigious Right Livelihood Award in 1982. Born as Petra Karin Lehmann in Günzburg, Bavaria, she later adopted the surname Kelly after her mother's marriage to a US Army officer. Her education took her to various locations, including Georgia, Virginia, and West Germany, where she pursued political science and earned degrees from American University and the University of Amsterdam. Kelly's career spanned advocacy and activism, notably at the European Commission in Brussels, where she championed peace and environmental campaigns. As a founding member of the German Green Party, she was elected to the Bundestag, advocating for nuclear disarmament and environmental issues. Tragically, Kelly's life came to a shocking end in 1992 when she and her partner, ex-general and Green politician Gert Bastian, were found deceased in her home in Bonn. Despite her untimely passing, her legacy as an influential environmentalist and advocate for social justice continues to inspire generations.

Petra Mavis Markham, born on 17 March 1944, is a distinguished British actress known for her remarkable contributions to theatre, television, and film. Hailing from a family deeply rooted in the entertainment industry, Petra's talent and passion for acting have shone through in her extensive and diverse filmography. She has showcased her acting prowess in notable films such as "The Deadly Affair" (1966), "Sunday Bloody Sunday" (1971), and "Out of Depth" (2000), captivating audiences with her compelling performances. Additionally, Petra has graced television screens with her presence in various acclaimed shows, including "Doctor Who," "Follyfoot," and "EastEnders," leaving an indelible mark with her versatile acting skills. With an impressive body of work spanning across different mediums, Petra Markham has undoubtedly solidified her status as a revered figure in the entertainment industry. Her remarkable contributions continue to inspire and resonate with audiences worldwide.

Petra Joy, born in 1964, is a prominent German feminist film director, producer, author, and photographer residing in Brighton, England. Recognized as a pioneer in creating pornography for women, she, along with other influential figures such as Candida Royalle and Annie Sprinkle, has significantly impacted the industry. Joy's work is categorized as "art-core," focusing on female sexuality, pleasure, and creative, sensual play. With a master's degree in Film History from the University of Cologne, Joy has directed and produced over 70 documentaries for international TV stations and has been at the forefront of producing lifestyle and sexuality content. Notably, in 2009, she established the Petra Joy Award, an international erotic film competition for first-time female directors, to encourage the genre of female perspective porn. Joy's films have been showcased at esteemed events like New York City’s Cinekink festival and the British Film Institute. Her dedication and influence have earned her numerous accolades, including the 2004 Erotic Award for Photographer of the Year and the 2007 FICEB Award for Best Softcore Film. Joy's significant contributions have undeniably reshaped the landscape of erotic filmmaking.