Born to a Welsh merchant working in Livorno, as a boy orphan, Llewelyn came under the care of an uncle.
He traveled to Liguria where he met the painters, including Lori and Discovolo, who had coalesced around Nomellini and became known as the Gruppo di Albaro, based on the hillside neighborhood where they worked.
In this hall, Costetti, De Carolis, Ghiglia, and Graziosi shared the walls with Lloyd.
Because he had maintained British citizenship, he was arrested and interned in a prisoner camp, first at Fossoli di Carpi, then in Bavaria, until released on the war's end in 1945.
Back in Italy, he was hosted by Roberto Papini, who collected his recollections in a semi-autobiographic but posthumous volume titled Tempi Andati (1949).