Amnon
Amnon was David's eldest son. He raped Tamar and was murdered by Absalom.Amnon was the progeny of David and Ahinoam. Tamar and Absalom were the progeny of David and Maacah. Thus Amnon and Absalom were half-brothers, like Abraham's son's Ishmael and Isaac.
Jewish law forbade Amnon to marry a half-sister, and taking evil advice he pretended to be sick. He lured Tamar into his quarters with the pretense that he wanted her to cook a special meal for him, ignored her protests and "lay with her". Two years later, Absalom engineered Amnon's death.
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