Soeiro Viegas Coelho was the very first Coelho, born in 1160. He was a noble, medieval Knight and portucalense rich-man. Soeiro gained the nickname of Coelho during the Christian Conquest because of his underground tactics.
Source:
http://pt.wikipedia.org/wiki/Soeiro_Viegas_CoelhoRough Translation:
Soeiro Viegas Coelho (1160 -) he was a noble, medieval Knight and portucalense rich-man and first that it assumed the last name Rabbit, perpetuated in its excessively descending children and, taken by lands of Conejo (Rabbit), next to the Douro, in the time of D. Sancho II of Portugal, King of Portugal in 1185.
Its wife in 1232 is registered together with as meritorious to make a donation of good to the Convent of They are João de Tarouca. As she affirms Diogo of the Chagas, this D. Soeiro gained the nickname of Rabbit during the war that stopped against the mouros “with secret and defense”, that it affirms “seemed to go for mines (term that in this direction way means underground that if opened so that the besiegers to penetrate underneath for of the walls or trenches of a besieged locality) for underneath of ambushes it to the land them and to fight with them”. This information when arriving at the knowledge of D. Sancho II, “this bragged said done and the assaults”, saying that it (D. Soeiro) that it mined under the soil as rabbit”.