The child of king Viserys and his dead former wife queen Aemma
'Rhaenyra targaryen'
The children of king Viserys and queen Alicent
'Aegon targaryen' 
'Aemond targaryen'
'Helena targaryen' 
The children of Rhaenyra targaryen and Laenor velaryon 
'Viserra velaryon' 
'Jaecaerys Velaryon' 
'Lucerys velaryon' 
'Joffrey velaryon'
Aegon, Aemond and Helena are Rhaenyra's half siblings from another mother, that makes them the half-uncles and half-aunt to Rhaenyra's children