The Seven Generations of Cain:

1.       Cain-                           קַיִן=160 or 710 (Kaf 500)

2.       Hanoch-                  חֲנוֹךְ =84 or 564 (Kaf 500)

3.       Irad-                         עִירָד=284

4.       Mehujael-           מְחוּיָאֵל=95

5.       Metushael-       מְתוּשָׁאֵל=777

6.       Lamech-                    לָמֶךְ=90 or 570 (Kaf 500)

7.       Tuval Cain-       תּוּבַל קַיִן= 598 or 1248 (Nun 700)

2088=18

4248=18 (final letters)

Lamech had two other sons by his other wife Adah:

8.       Yabal-                     יָבָל = 42

9.       Yuval-                     יוּבָל= 48

2178=18

4338=18