In the Piglin culture, they're frequently named in reference of what keeps them living. It might be abstract like an ideal, a wish, emotion, allegiance, or something more concrete like something related to their career/services they provide. So, Technoblade is quite literally calling himself a weapon, because fighting is what he lives for. It’s the challenge that pushes him further and further, motivation singing in his veins like adrenaline. All he wants is to fight for his friends and his ideals. It’s a way as claiming to be a protector, to him. A promise of safety and danger in one breath.
Which is why it hurts so much when all that meaning is stripped down to a simple tool.
Anyway, fluff time: as a little way of showing endearment, he gives his friends weapon nicknames. Philza is Fletching, as a reference to his feathers and also how no matter how far away he is he’ll always shoot over to technos side if he calls for him. Ranboo is Whipsnap, both for their tail and twig thinness but also a joke about them being a whippersnapper since Techno is their ‘old wizened’ mentor. Tommy is dagger, which started off as a cute diminutive and a joke about him being tiny, but became all too poignant when he became a dagger in technos back. And so on and so forth.
