Errors in my original message. Grandmother's name: Lily Robinson (formally Tolliver)worked as model in Bristol UK. Her father William Tolliver worked as engine driver in cotton factory in US. Emigrated to UK circa. 1910. All tollivers in UK stem from him. Tolliver is believed an adaptation of Portuguese T'ollivera. Melungeon heritage almost a certainty.
Artist William tolliver NOT confirmed as relation.