The name Iker is of Basque origin and is derived from the Basque word "iker" which means "study" or "research". The Basque people are an ethnic group concentrated in the Basque Country, a region straddling the border between Spain and France.

The earliest recorded use of the name Iker dates back to the 11th century in the Basque region. It was commonly used as a given name among the Basque people during the medieval period.

One of the earliest known historical figures with the name Iker was Iker Munaldetarra, a Basque writer and poet who lived in the 12th century. His works were influential in the preservation and promotion of the Basque language and culture.

Another notable figure named Iker was Iker Ezkerraldekoa, a Basque navigator and explorer from the 15th century. He is believed to have been one of the first Europeans to explore parts of the Americas, predating the voyages of Christopher Columbus.

In the 16th century, Iker Iruñekoa was a prominent Basque architect who designed several churches and castles in the region. His works are considered important examples of Basque Renaissance architecture.

Moving forward to the 19th century, Iker Bizkaitar was a Basque writer and journalist known for his contributions to the Basque literary renaissance. He played a crucial role in promoting the use of the Basque language in literature and journalism.

In more recent times, Iker Casillas, born in 1981, is a Spanish former professional footballer who played as a goalkeeper. He is considered one of the greatest goalkeepers in the history of the sport and captained the Spanish national team to victory in the 2010 FIFA World Cup.