Spanish duque

← Spanish dux (doublet)

← Old French duc (borrowed)

← Latin dux (derived)

→ Bikol Central duke (borrowed)

→ Spanish dux (doublet)

→ Spanish duquesa (suffix)

→ Spanish marqués (link)

→ Spanish archiduque (affix)

→ Spanish exduque (affix)

→ Tagalog duke (borrowed)