I just saw a posting about 'Kolchak Island is back on the map.' That must have been an island in the Arctic Ocean on the northern coast of Russia... where Malyy Taymrr is now. Malyy Taymrr was officially dubbed Tsarevich Alexei Island when it was discovered by Russian explorers early in the 20th century. Imagine having an island named after you when you are a child!
Were there other things -- buildings, schools, etc. named after him? I think the 'Alexei Military School' might have been, but I could be wrong.