Alonso

Alonso is a Spanish name of Germanic origin that is a Galician-Portuguese variant of "Adalfuns".
Geographical distribution.
As of 2014, 36.6% of all known bearers of the surname "Alonso" were residents of Spain (frequency 1:222), 26.1% of Mexico (1:832), 8.3% of Cuba (1:242), 7.0% of Argentina (1:1,061), 4.8% of Brazil (1:7,502), 4.5% of the United States (1:14,083), 2.5% of Colombia (1:3,318), 1.7% of Paraguay (1:736), 1.3% of France (1:9,082) and 1.1% of Uruguay (1:549).
In Spain, the frequency of the surname was higher than average (1:222) in the following regions: