Hiệu (Vietnamese) comes from Chinese 號, from Proto-Vietic kaw, from Dutch kauwen, from Middle Dutch couwen, from Old Dutch kiuwan, from Proto-West Germanic keuwan, from Proto-Germanic kewwaną, from Proto-Indo-European ǵyewh₁- — to chew.
Ancestry of “Hiệu”, step by step
Hiệu traces back through 3 separate lines of ancestry.