Elias Abraham Rosenberg (Hebrew: אליאס אברהם רוזנברג; Hawaiian: Eliaka Apelahama Loselabeka; c. 1810 – July 10, 1887) was a Jewish immigrant to the United States who, despite a questionable past, became a trusted friend and adviser of King Kalākaua of Hawaii. Regarded as eccentric, he lived in San Francisco in the 1880s and worked as a peddler selling illegal lottery tickets. In 1886, he traveled to Hawaii and performed as a fortune-teller. He came to Kalākaua's attention, and endeared himself to the king with favorable predictions about the future of Hawaii. Rosenberg received royal appointments to several positions: kahuna-kilokilo (royal soothsayer), customs appraiser, and guard. He was given lavish gifts by the king, but was mistrusted by other royal advisers and satirized in the Hawaiian press.
Rosenberg and Kalākaua often held long conversations and enjoyed drinking alcohol together; Rosenberg told the king Bible stories and encouraged him to revive traditional Hawaiian religion, an idea that fascinated Kalākaua but angered his political rivals. In June 1887, Rosenberg returned to California, possibly owing to poor health or fear of unrest in Hawaii; a short time after arriving in San Francisco, he died in a local hospital. Soon after his departure from Hawaii, the June 1887 Constitution—which curtailed royal power—was forced upon Kalākaua. A Torah scroll and yad presented to the king by Rosenberg remained in the royal collection. These artifacts were later exhibited with other royal treasures and eventually donated to Temple Emanu-El in Honolulu.