Thomas Lambert (3 December 1854 – 17 April 1944) was a New Zealand medical doctor, horticulturist, journalist and writer.
He studied medical training at St. Vincent's Hospital, Dublin, for eighteen months as a surgeon, becoming skilled at obstetrics, dressing wounds, and setting bones.
Mary Jane Lambert was forced to make home in a two-room whare with a dirt floor, where she previously had a large house with four indoor servants.
Lambert became so interested in the history of the Māori of Wairoa that he became a fluent speaker, a trusted interpreter, and explorer of the district.
William Lambert died in 1907, leaving Thomas the sole support of his mother and sisters, as well as having to provide for his own large family.