The surname of SIBBORN was a baptismal name 'the son of Sebern'. Following the Crusades in Europe in the 11th 12th and 13th centuries, a need was felt for an additional name. This was recognized by those of nobler birth that it would add prestige and practical advantage to their status. The name was derived from the Old English name SAEBORN, meaning sea-warrior, and Monahcus Philipus Seberni, recorded in the year 1114 in London, appears to be the first of the name on record. Margareta filia Seberni was recorded in 1207, County Norfolk. At first the coat of arms was a practical matter which served a function on the battlefield and in tournaments. With his helmet covering his face, and armour encasing the knight from head to foot, the only means of identification for his followers, was the insignia painted on his shield, and embroidered on his surcoat, the draped and flowing garment worn over the armour. Other records of the name mention Alexander Sebern, 1273, County Huntingdonshire, and Geoffrey Sebern was recorded in the year 1300 in County Cambridge. Thomas Siborne of Yorkshire, was listed in the Yorkshire Poll Tax of 1379. In many parts of central and western Europe, hereditary surnames began to become fixed at around the 12th century, and have developed and changed slowly over the years. As society became more complex, and such matters as the management of tenure, and in particular the collection of taxes were delegated to special functionaries, it became imperative to distinguish a more complex system of nomenclature to differentiate one individual from another. Later instances include Robert Seaborn and Mary Banking who were married at St. George's, Hanover Square, London in the year 1789. Thomas Preece and Mary Seabourn were married in the same church in 1805. The eagle depicted in the arms is emblematical of fortitude and magnaminity of mind. The Romans used the figure of an eagle for their ensign, and their example has been often followed. It is the device of Russia, Austria, Germany and the United States of America.