Complex sentence: Browne is a variant surname that in the French "Brun" which becomes "de Brun" in Gaelic in Ireland (11th century) or a variant of the anglisized English surname Brown (surname).
Split into simpler sentences: Browne is a variant surname that in the French is "Brun". Brun becomes "de Brun" in Gaelic in Ireland (11th century) or a variant of the anglisized English surname Brown (surname).