This is an English locational surname, although one of pre 7th century Danish-Viking origins. It originates from a place called Thrimby, said to be a parish or chapelry in the county of Westmoreland. The name is belived to translate as the farm (bi) at the thorn bushes, which was probably a reference to a defensive hedge-wall of thorn, which acted both to deter brigands, and also helped to contain the cattle at night or during winter. Recorded as Trembey, Trimbey, Trimby, Trymbey and probably others, the surname being locational it is probably not surprising to find that the earliest recording that we have is that of Cuthbert Trembey of Stourton in the county of Wiltshire, when his daughter Mary was baptised there in the year 1615. Locational surnames were 'from' names. That is to say names given to people after they left their original homes, to move somewhere else. Spelling being at best indifferent and dialects very thick, often lead to the creation of 'sounds like' spellings. A slightly later recording in 1624 at the same church is that of the baptism of Andrew Trimbey. Not only has the surname spelling changed but he is given as being the son of Cutbert!