-ski/-ska, -scy/ski, -wicz - Polish surnames help

My Surname is "Jaskiewicz", I am completely clueless as to origins, or meaning. All I know is that its Polish, can anyone give further insight?

@Jaskiewicz
Just a guess but if it was Jaśkiewicz it might be son of Jaśko/ Jaś (John /Johnny).

@BogFrog
Hey,

My name is Marek and my grandparents' surname was Orlenkowicz, and my great-grandfather went to New York around 1931 to live with his brother, his name was Konstantyn Orlenkowicz. If it is correct, please write an e-mail: marek.wawrzola88@gmail.com

From the entries here, I gather that my fathers name of "Roslanowicz" means son of Roslan. Does anyone know what "Roslan" means or refers to? Is it Ross? Also my grandmothers maiden name was Morawa. I gather from this site that that means daughter of Mor? Is that correct? What name would "Mor" translate to? Last, I haven't read much in surnames ending in "czek." My mom's maiden name is Garczek. What can anyone tell me about its meaning? Thank you

Roslan is a name: namespedia.com/details/Roslan
Morawa - it may refer to Moravia, the name of geographical land (Czech region)
Garczek - small pot - regional spelling of the word 'garnek'