Brown was born on a farm in Illinois, United States, and received a bachelor's degree from Columbia University in 1968. She then became a journalist in South Vietnam, where her brother was serving in the U.S. Army during the Vietnam War. Interested in Asian art, she earned a master's degree from University of Singapore in 1973. She married and made her home in Bangkok, but she was run over and nearly killed in a traffic accident in the 1980s, which cost her a leg and seriously damaged her hearing. Nevertheless, in 2004, she received a Ph.D. from UCLA, working on the so-called Ming Gap, a 300-year interval when China blocked exports of ceramics. A production boom across Southeast Asia resulted. Brown's analysis of ceramics recovered from shipwrecks of the period "revolutionized the understanding of trade patterns in the region," according to colleagues cited in the Los Angeles Times.
A medical malpractice lawsuit was filed by her son, Taweesin Ngerntongdee, after it was determined that Brown had died of peritonitis caused by a perforated ulcer. The suit claimed she had suffered stomach problems in the detention center and that other inmates took her to a shower after a guard would not respond when she vomited something that "smelled like excrement." When Brown requested for help after the 10 p.m. lockdown on May 13, the guard told her she would have to wait until the morning for medical attention, according to the suit. Detention center officials acknowledged there was no overnight medical staff on duty and took the case to mediation. The federal government settled the case for $880,000 in July 2009. Attorney Tim Ford stated part of the settlement stipulated that Brown's death would be investigated by the Federal Bureau of Prisons.
Books
She was author of a number of academic books on Southeast Asian ceramics. Among the ones that established her early reputation are:
Brown, Roxanna M. The Ceramics of South-East Asia: Their Dating and Identification. Oxford in Asia studies in ceramics. Kuala Lumpur: Oxford University Press, 1977.
Brown, Roxanna M. "Guangdong Ceramics from Butuan and Other Philippine Sites: An Exhibition Catalogue." Makati, Metro Manila, Philippines: The Society, 1989.
Brown, Roxanna. Ceramic Excavations in the Philippines A Talk Given to the Southeast Asian Ceramic Society. Singapore: Southeast Asian Ceramic Society, 1972.
Brown, Roxanna M. The Legacy of Phra Ruang: An Exhibition of Thai Ceramics and of Ancient Pottery from Ban Chieng, Wednesday, 12 June-Wednesday, 26 June 1974. London: Bluett & Sons, 1974.
Among her later works are:
Brown, Roxanna M., and Sten Sjostrand. Maritime Archaeology and Shipwreck Ceramics in Malaysia. Kuala Lumpur, Malaysia: Published on the occasion of the exhibition Malaysian Maritime Archaeology by Dept. of Museums & Antiquities in collaboration with Nanhai Marine Archaeology Sdn. Bhd, 2001.
Brown, Roxanna M., and Sten Sjostrand. Turiang: A Fourteenth-Century Shipwreck in Southeast Asian Waters. Pasadena, CA: Pacific Asia Museum, 2000..