KärkkäinenFinnish From Finnish kärkäs meaning ”eager” and the suffix -nen. A Finnish department store chain bears this name after its founder, Juha Kärkkäinen.
KirwanIrish From Gaelic Ó Ciardhubháin meaning "descendant of Ciardhubhán", a given name composed of the elements ciar "dark" and dubh "black" combined with a diminutive suffix.
KlobučarSlovene, Croatian, Serbian Occupational name derived from Serbian, Croatian and Slovene klobučar meaning "hatter" (a derivative of klobuk meaning "hat"), originally indicating a person who made, sold or repaired hats.
LammersEnglish Habitational name from either Lamas in Norfolk or Lamarsh in Essex, derived from Old English lām "loam, clay" combined with ersc "plowed field" or mersc "marsh".
LudlamEnglish Derived from the old English word hlud "loud, roaring" (compare germanic hlud), which gave the name to the river Hlude and ham "water meadow"
LytvynenkoUkrainian It indicates being a descendant of someone who lived in the medieval Grand Duchy of Lithuania but wasn't necessarily of the Lithuanian ethnicity.
MadrigalSpanish "Madrigal" comes from from the Venetian madregal "simple, ingenuous," from Late Latin matricalis "invented, original," literally "of or from the womb," from matrix (gen. matricis) "womb."
MasudaJapanese From Japanese 増 (masu) meaning "increase", 益 (masu) meaning "benefit", 舛 (masu) meaning "oppose, to go against" (kun reading), 桝 (masu) meaning "box seat, measure" or 升 (masu) meaning "box" and 田 (ta) meaning "field, rice paddy".
MavromichalisGreek Means "black Michalis (Michael)" in Greek. In Mani, it is said to derive from an orphan named Μιχάλης (Michalis). Because of the dark clothing worn during times of mourning, orphans were often called μαύρος (mavros) meaning "black".