It's kind of funny to think that the best name Estonians could come up with for their people until the mid-19th century was maarahvas - the country people. Because if you look at the saga of Olaf Tryggvason, an early Norwegian king who lived in Estonia for some time, the name Eistland is clear to see. In fact, the Icelanders who use the language of the sagas today refer to Estonia by its 1,200 year old name - Eistland.
In some historical references, the term "Estonian Vikings" is used to describe the Eistlandic activities on the Baltic seas during the era of Norse invasions. But really, I think the term 'pirates' better suits the situation. Here's the text from the original Heimskringla sagas, which includes the saga of Olaf.
Þar skildist Ólafr við móður sína, ok tók við honum Klerkon, eistneskr maðr, ok þeim Þórólfi ok Þorgilsi. Klerkon þótti Þórólfr gamall til þræls, þótti ok ekki forverk í honum ok drap hann, en hafði sveinana með sér ok seldi þeim manni, er Klerkr hét, ok tók fyrir hafr einn vel góðan. Hinn þriði maðr keypti Ólaf ok gaf fyrir vesl gott eða slagning; sá hét Reas, kona hans hét Rekon, en son þeirra Rekoni. Þar var Ólafr lengi ok vel haldinn, ok unni búandi honum mikit. Ólafr var 6 vetr á Eistlandi í þessarri útlegð.
Olaf Tryggvason (c. 960 - 1,000 AD) was the great-grandson of Harald Fairhair - the first King of Norway. Due to some typical Viking blood fueding, Olaf had to escape to Novgorod where is uncle was in service to the king. However, he didn't get there on time.
The journey was not successful -- in the Baltic sea they were captured by Estonian vikings, and the people aboard were either killed or taken as slaves. Olaf became the possession of a man named Klerkon, together with his foster father Thorolf and his son Thorgils. Klerkon considered Thorolf too old to be useful as a slave and killed him, and then sold the two boys to a man named Klerk for a stout and a good ram. Olaf was then sold to a man called Reas for a fine cloak.
Reas proved to be a better host to Olaf in Eistland than Klerkon. Together with his wife Rekon and son Rekone, they lived as a family unit until six years later when Sigurd Eiriksson spotted Olaf at a market and bought him back from Reas. Olaf later met up with Klerkon at a market in Novgorod and killed him with an axe. Later they had some beer. And all was right with the world.
For you Estonian readers, there is a version of Olaf's tale available in Estonian here.