Popularity (masculine) in Brazil (by decade)

1940 1950 1960 1970 1980 1990 16,000 12,800 9,600 6,400 3,200 1930 2000
    

Numbers

 Isaac (masculine) 
 Year   Rank   Times Used 
2000 #162 13263
1990 #338 5010
1980 #433 3717
1970 #693 1758
1960 #653 1404
1950 #697 867
1940 #852 421
1930 #719 296