Pompeo Battoni
Christ with Saints Julian, Basilissa, Celsus and Marcionilla

The Getty Museum, Los Angeles

Left to right in the lower register are Julian and Basilissa (sharing a single lily stalk), Celsus, and Marcionilla. All four have palm branches to signify their martyrdom, but the lily stalk is the only other attribute.

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More of these four saints

Source: Wikimedia Commons