Gilbert Mair (Peterhead, Scotland, 23 May 1799 – Whangarei, 16 July 1857) was a sailor and a merchant trader who visited New Zealand for the first time when he was twenty, and lived there from 1824 till his death. He married Elizabeth Gilbert Puckey. They had twelve children. Among them were "famous New Zealanders" like Captain Gilbert Mair and Major William Gilbert Mair.
In 1835 Gilbert Mair senior signed the Declaration of Independence of New Zealand as a witness (together with James Clendon) when a number of northern Māori rangatira (chiefs) established themselves as representing a confederation under the title of the "United Tribes of New Zealand". Gilbert Mair senior was "present at the signing of the Treaty of Waitangi in 1840, and he and his family were acquainted with many of the noted men who visited the Bay of Islands".
Gilbert Mair had sailed on the whaling vessel New Zealander in 1820. At this occasion he visited New Zealand for the first time. When it returned to England on 2 March 1820, the missionary Thomas Kendall was among the passengers, together with Hongi Hika and Waikato, the two rangatira of Ngāpuhi iwi (tribe) that were the first Māori to come to England. In 1823 he made his second trip to New Zealand. This time he bought two preserved heads. In 1824 he made his third visit. He would never sail back to England again.
Herald was a 55-ton mission schooner, built at the beach of Paihia in the Bay of Islands. Missionary Henry Williams laid the keel for the vessel in 1824. He needed a ship to provision the mission stations and to visit the more remote areas of New Zealand to bring the Gospel. When Gilbert Mair visited New Zealand for the third time, Williams asked him to assist in building the ship. When the Herald was finished in 1826, Mair became the sailing master.