Maria Anderson Roberto (born 1880) was a chaperone for the Native Nurses program in Guam from 1914 to 1924 during the US Naval occupation of the island.

[2] In CHamoru culture, unmarried women were always accompanied by a chaperone, who was typically an older woman or close male relative.

[2] She protected and nurtured the students as they trained at the naval hospital, helping them pass exams and serving as a "surrogate mother.

"[2] Additionally, as a respected CHamoru woman, Roberto bridged the general distrust for the naval administration and Western healthcare practices.

[4] Roberto's deportation caused mass community outrage and grief throughout the island.