[TABLE="class: grid, width: 750"]
<tbody>[TR]
[TD][/TD]
[TD]A[/TD]
[TD]B[/TD]
[TD]C[/TD]
[TD]D[/TD]
[/TR]
[TR]
[TD]1[/TD]
[TD]First Name[/TD]
[TD]Last Name[/TD]
[TD]Consecutive Consonants First Name[/TD]
[TD]Consecutive Consonants Last Name[/TD]
[/TR]
[TR]
[TD]2[/TD]
[TD]Ndoluvo[/TD]
[TD]Khaye[/TD]
[TD]TRUE[/TD]
[TD]TRUE[/TD]
[/TR]
</tbody>[/TABLE]
Using the formula in C2:
=NOT(OR(IFERROR(SEARCH("a",LEFT(A2,2)),FALSE),IFERROR(SEARCH("e",LEFT(A2,2)),FALSE),IFERROR(SEARCH("I",LEFT(A2,2)),FALSE),IFERROR(SEARCH("o",LEFT(A2,2)),FALSE),IFERROR(SEARCH("u",LEFT(A2,2)),FALSE)))
And in D2:
=NOT(OR(IFERROR(SEARCH("a",LEFT(B2,2)),FALSE),IFERROR(SEARCH("e",LEFT(B2,2)),FALSE),IFERROR(SEARCH("I",LEFT(B2,2)),FALSE),IFERROR(SEARCH("o",LEFT(B2,2)),FALSE),IFERROR(SEARCH("u",LEFT(B2,2)),FALSE)))