New Zealand author and judge, who was known for his histories of the British colony in New Zealand and for his service as a judge (1865–76) in land disputes, the key issue dividing settlers and the native Maoris (Maori).

The Maning family immigrated to Van Diemen's Land (now Tasmania) in 1824, and in 1833 Maning moved to Hokianga in the northern part of North Island, N.Z., where he worked as a trader in timber and flax. In 1837 he settled at Onoke, Hokianga, which became his home for the next 40 years, and married the sister of a Maori chief. Maning clashed with the colony's governor, William Hobson, and may have advised the Maoris against signing the Treaty of Waitangi (1840), which established British sovereignty. In an intertribal war (1845–46) involving the northern leader Hone Heke, Maning assisted Heke's victorious opponents. His account of the campaign, The History of the War in the North Against the Chief Heke, was published in 1862.

Maning's extensive knowledge of Maori culture led to his appointment in 1865 as judge in the native land court and also aided him in his decisions. For reasons not fully apparent, he developed an animosity for the Maori in later life. His account of his first years in the colony, Old New Zealand (1863), and his voluminous correspondence remain valuable chronicles of the colony's early history.