Short of trawling through varieties, and there are about 3000 named cultivars, I can only say that yours is a camellia japonica cultivar. Camellia 'Lasca Beauty' is a possibility, but I'm doing little more than guessing!

If it's blooming now, it might also be a C. sasanqua or C. saluensis variety or hybrid. More likely if the leaves are less than 2 1/2 inches long.