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	Costantino	Constant; Steady; Diminutive of Constantin; Stable
	Costas	Constant or steady. It's the short form of Constantine.
	Costel	Constant; Steadfast; Diminutive of Constantin
	Costello	Son of Oisdealbhaigh
	Costentyn	The Cornish form of Constantin. It means constant or steady.
	Coster	Derived from Costermonger; Seller of Costard (a type of Apple); It is an unusual first name but a more common surname.
	Costi	A free detailed and creative person
	Costica	Stable; Steadfast; Diminutive of Constantin
	Costin	Constant; Steady; Diminutive of Constantin