Raymond Schubart Suckling was a dutiful engineering executive who lived simply, loved military history and cherished the legacy left by his parents.The late Sewickley resident has become one of the region's most significant philanthropists, donating $37.1 million to The Pittsburgh Foundation, the second-largest gift in its 73-year history. The bequest, which was finalized in December, will provide annual grants of about $500,000 each to two charities named in his will: the Sewickley Public Library and the Sewickley Valley Hospital Foundation. The bequest also provides the same amount annually to the Foundation for programs and services under its 100 Percent Pittsburgh organizing principle – specifically benefitting low-income youth and families in the region around Sewickley.