Really now? I wonder what history books you've been reading.
The "Latvians" were actually various tribes som of which are also part of modern day Lithuania like the Selonians and Curonians.
Also, some of the tribes in modern day LAtvia were very vicious in their fights against the crusading orders, particularly the Semigallians and the Curonians who both played a major role in some of the large battles such as the Battle of Saule and the Seige of Riga. The Semigallian leader Viestards is also quite a notable person for this period.
Also, When you say Estonians, you should probably specify the tribe on Saaremaa since they were the only Estonians that truely held out for a long period.