This is the 8113th most frequent Russian word.
латышев
"Латышев" is a Russian surname and does not have a standalone meaning in English.
Here, 'Латышев' serves as a nominative noun referring to a surname.
Латышев – это популярная фамилия в Латвии.
Latyshev is a popular surname in Latvia.
In this sentence, 'Латышевым' is in the instrumental case indicating association with the individual.
Я знаком с господином Латышевым.
I am acquainted with Mr. Latyshev.
'Латышеву' in this sentence is in the dative case to indicate possession or ownership.