*apuldraz (Proto-Germanic) comes from Proto-Germanic trewą, from English doru, from Ancient Greek δόρυ, from Proto-Hellenic dóru, from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.
Ancestry of “*apuldraz”, step by step
*apuldraz traces back through two separate lines of ancestry.