Tamara Nina Arbore (1889 – 1942) was a Romanian painter and illustrator, known for her still-lifes and portraits.

Her father, Zamfir and older sister, Ecaterina were both well-known political activists.

In 1906, she enrolled at the Women's Academy of the Munich Artists' Association, where she studied with Angelo Jank.

Together with her friends, Cecilia Cuțescu-Storck and Olga Greceanu [ro], she formed what was known as the "Grup al celor trei doamne" (Group of Three Ladies),[1] as a counterweight to the "Grupul celor patru" (Group of Four), consisting of Nicolae Tonitza, Francisc Șirato, Ștefan Dimitrescu and Oscar Han.

[2] Her reputation was enhanced by a series of social-awareness themed engravings and illustrations done for the magazine Cuvântul Liber during the thirties.