The following are the adoptable male children which you can adopt in Skyrim: Hearthfire
Alesan - Dawnstar
Blaise - Katla's Farm
Francois Beaufort - Honorhall Orphanage
Gralnach - Heartwood Mill
Hroar - Honorhall Orphanage
Samuel - Honorhall Orphanage
Skuli - Old Hroldan