do level best

do your level best

to try very hard to do something (often + to do sth) Tickets are quite hard to come by but I'll do my level best to get you one.

Name	Pronounced	Usage
Malwina	mahl-VEE-nah	Polish
Stavros	-	Greek
Sidney	SID-nee	English
Hieronymus	hee-RO-nee-muws (German)	German, Dutch (Archaic), Ancient Greek (Latinized)
Monica	['mɔnikə]
Grenville	GREN-vil	English (Rare)