Lonza is a rare boys' name that was most common in the 1910s and has all but disappeared.
Lonza is a boy name. It last appears in U.S. records in 1971. Lonza was first reported in SSA data in 1900 and peaked in 1916 (14 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 1971 | 6 | — | #4,716 |
| 1967 | 5 | — | #4,323 |
| 1959 | 6 | — | #3,847 |
| 1958 | 5 | — | #4,286 |
| 1956 | 7 | — | #3,404 |
| 1955 | 6 | — | #3,731 |
| 1954 | 6 | — | #3,672 |
| 1953 | 10 | — | #2,645 |
| 1952 | 5 | — | #4,061 |
| 1950 | 9 | — | #2,699 |
| 1949 | 7 | — | #3,185 |
| 1948 | 9 | — | #2,712 |
| 1947 | 10 | — | #2,598 |
| 1944 | 5 | — | #3,720 |
| 1943 | 7 | — | #3,119 |
| 1942 | 9 | — | #2,632 |
| 1941 | 6 | — | #3,356 |
| 1940 | 9 | — | #2,600 |
| 1939 | 6 | — | #3,332 |
| 1937 | 5 | — | #3,832 |
| 1936 | 14 | — | #1,935 |
| 1935 | 6 | — | #3,491 |
| 1934 | 8 | — | #2,865 |
| 1933 | 10 | — | #2,467 |
| 1932 | 6 | — | #3,611 |
| 1931 | 9 | — | #2,790 |
| 1930 | 12 | — | #2,391 |
| 1929 | 5 | — | #4,319 |
| 1928 | 8 | — | #3,256 |
| 1927 | 9 | — | #3,056 |
| 1926 | 9 | — | #3,039 |
| 1925 | 13 | — | #2,381 |
| 1924 | 8 | — | #3,399 |
| 1923 | 12 | — | #2,542 |
| 1922 | 11 | — | #2,735 |
| 1921 | 12 | — | #2,574 |
| 1920 | 13 | — | #2,406 |
| 1919 | 6 | — | #3,988 |
| 1918 | 7 | — | #3,571 |
| 1917 | 11 | — | #2,505 |
| 1916 | 14 | — | #2,106 |
| 1915 | 8 | — | #2,963 |
| 1910 | 5 | — | #1,749 |
| 1900 | 6 | — | #1,255 |