Leodhasach & Hearasch - Gaelic help please

I understand that the Gaelic noun for someone from Lewis is LEODHASACH
and the Gaelic noun for someone from Harris is HEARASCH.

1. Are these nouns spelled the same when applying to males and
females?

2. What is the plural form of each noun? I am looking for collective
Gaelic terms for 'people from Harris' and 'people from Lewis' in the
same way as one has 'Glaswegians' / 'Aberdonians' etc.

3. Phonetic pronunciations for: LEODHASACH, HEARASCH and their plural
forms would be much appreciated as I do not speak or write Gaelic
myself.

I shall be most grateful for any assistance.

Karen
.

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